diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 0a7a14544..6b52d6b59 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -385,7 +385,7 @@ We use [golangci-lint](https://golangci-lint.run/) for linting, which allows us
 
 If you make a PR that doesn't pass the linter, it will be rejected. As such, it's good practice to run the linter locally before pushing or opening a PR.
 
-To do this, first install the linter following the instructions [here](https://golangci-lint.run/usage/install/#local-installation).
+To do this, first install the linter following the instructions [here](https://golangci-lint.run/welcome/install/).
 
 Then, you can run the linter with:
 
diff --git a/docs/api/swagger.yaml b/docs/api/swagger.yaml
index 1a5dd1fc3..ee2fb5974 100644
--- a/docs/api/swagger.yaml
+++ b/docs/api/swagger.yaml
@@ -2114,7 +2114,7 @@ definitions:
             bitrate:
                 description: Bitrate of the media in bits per second.
                 example: 1000000
-                format: int64
+                format: uint64
                 type: integer
                 x-go-name: Bitrate
             duration:
diff --git a/internal/api/client/admin/emojicreate.go b/internal/api/client/admin/emojicreate.go
index 75661f1c3..9696200de 100644
--- a/internal/api/client/admin/emojicreate.go
+++ b/internal/api/client/admin/emojicreate.go
@@ -145,8 +145,8 @@ func validateCreateEmoji(form *apimodel.EmojiCreateRequest) error {
 		return errors.New("no emoji given")
 	}
 
-	maxSize := config.GetMediaEmojiLocalMaxSize()
-	if form.Image.Size > int64(maxSize) {
+	maxSize := int64(config.GetMediaEmojiLocalMaxSize()) // #nosec G115 -- Already validated.
+	if form.Image.Size > maxSize {
 		return fmt.Errorf("emoji image too large: image is %dKB but size limit for custom emojis is %dKB", form.Image.Size/1024, maxSize/1024)
 	}
 
diff --git a/internal/api/client/admin/emojiupdate.go b/internal/api/client/admin/emojiupdate.go
index 37f67cabd..ec6987024 100644
--- a/internal/api/client/admin/emojiupdate.go
+++ b/internal/api/client/admin/emojiupdate.go
@@ -208,8 +208,8 @@ func validateUpdateEmoji(form *apimodel.EmojiUpdateRequest) error {
 		}
 
 		if hasImage {
-			maxSize := config.GetMediaEmojiLocalMaxSize()
-			if form.Image.Size > int64(maxSize) {
+			maxSize := int64(config.GetMediaEmojiLocalMaxSize()) // #nosec G115 -- Already validated.
+			if form.Image.Size > maxSize {
 				return fmt.Errorf("emoji image too large: image is %dKB but size limit for custom emojis is %dKB", form.Image.Size/1024, maxSize/1024)
 			}
 		}
diff --git a/internal/api/model/attachment.go b/internal/api/model/attachment.go
index 21523a58e..f037a09aa 100644
--- a/internal/api/model/attachment.go
+++ b/internal/api/model/attachment.go
@@ -160,7 +160,7 @@ type MediaDimensions struct {
 	Duration float32 `json:"duration,omitempty"`
 	// Bitrate of the media in bits per second.
 	// example: 1000000
-	Bitrate int `json:"bitrate,omitempty"`
+	Bitrate uint64 `json:"bitrate,omitempty"`
 	// Size of the media, in the format `[width]x[height]`.
 	// Not set for audio.
 	// example: 1920x1080
diff --git a/internal/cache/domain/domain.go b/internal/cache/domain/domain.go
index 274a244f7..c9a43b1e5 100644
--- a/internal/cache/domain/domain.go
+++ b/internal/cache/domain/domain.go
@@ -220,7 +220,7 @@ func (n *node) getChild(part string) *node {
 
 	for i < j {
 		// avoid overflow when computing h
-		h := int(uint(i+j) >> 1)
+		h := int(uint(i+j) >> 1) // #nosec G115
 		// i ≤ h < j
 
 		if n.child[h].part < part {
diff --git a/internal/db/bundb/bundb.go b/internal/db/bundb/bundb.go
index b5d3ff003..d10f372fd 100644
--- a/internal/db/bundb/bundb.go
+++ b/internal/db/bundb/bundb.go
@@ -25,6 +25,7 @@ import (
 	"encoding/pem"
 	"errors"
 	"fmt"
+	"math"
 	"net/url"
 	"os"
 	"runtime"
@@ -489,7 +490,10 @@ func deriveBunDBPGOptions() (*pgx.ConnConfig, error) {
 		cfg.Host = address
 	}
 	if port := config.GetDbPort(); port > 0 {
-		cfg.Port = uint16(port)
+		if port > math.MaxUint16 {
+			return nil, errors.New("invalid port, must be in range 1-65535")
+		}
+		cfg.Port = uint16(port) // #nosec G115 -- Just validated above.
 	}
 	if u := config.GetDbUser(); u != "" {
 		cfg.User = u
diff --git a/internal/federation/dereferencing/emoji.go b/internal/federation/dereferencing/emoji.go
index 12c648556..1ac27f2b2 100644
--- a/internal/federation/dereferencing/emoji.go
+++ b/internal/federation/dereferencing/emoji.go
@@ -97,11 +97,11 @@ func (d *Dereferencer) GetEmoji(
 			}
 
 			// Get maximum supported remote emoji size.
-			maxsz := config.GetMediaEmojiRemoteMaxSize()
+			maxsz := int64(config.GetMediaEmojiRemoteMaxSize()) // #nosec G115 -- Already validated.
 
 			// Prepare data function to dereference remote emoji media.
 			data := func(context.Context) (io.ReadCloser, error) {
-				return tsport.DereferenceMedia(ctx, url, int64(maxsz))
+				return tsport.DereferenceMedia(ctx, url, maxsz)
 			}
 
 			// Create new emoji with prepared info.
@@ -189,11 +189,11 @@ func (d *Dereferencer) RefreshEmoji(
 			}
 
 			// Get maximum supported remote emoji size.
-			maxsz := config.GetMediaEmojiRemoteMaxSize()
+			maxsz := int64(config.GetMediaEmojiRemoteMaxSize()) // #nosec G115 -- Already validated.
 
 			// Prepare data function to dereference remote emoji media.
 			data := func(context.Context) (io.ReadCloser, error) {
-				return tsport.DereferenceMedia(ctx, url, int64(maxsz))
+				return tsport.DereferenceMedia(ctx, url, maxsz)
 			}
 
 			// Update emoji with prepared info.
@@ -255,11 +255,11 @@ func (d *Dereferencer) RecacheEmoji(
 			}
 
 			// Get maximum supported remote emoji size.
-			maxsz := config.GetMediaEmojiRemoteMaxSize()
+			maxsz := int64(config.GetMediaEmojiRemoteMaxSize()) // #nosec G115 -- Already validated.
 
 			// Prepare data function to dereference remote emoji media.
 			data := func(context.Context) (io.ReadCloser, error) {
-				return tsport.DereferenceMedia(ctx, url, int64(maxsz))
+				return tsport.DereferenceMedia(ctx, url, maxsz)
 			}
 
 			// Recache emoji with prepared info.
diff --git a/internal/federation/dereferencing/media.go b/internal/federation/dereferencing/media.go
index 859e5603f..3bed4b198 100644
--- a/internal/federation/dereferencing/media.go
+++ b/internal/federation/dereferencing/media.go
@@ -77,14 +77,14 @@ func (d *Dereferencer) GetMedia(
 			}
 
 			// Get maximum supported remote media size.
-			maxsz := config.GetMediaRemoteMaxSize()
+			maxsz := int64(config.GetMediaRemoteMaxSize()) // #nosec G115 -- Already validated.
 
 			// Create media with prepared info.
 			return d.mediaManager.CreateMedia(
 				ctx,
 				accountID,
 				func(ctx context.Context) (io.ReadCloser, error) {
-					return tsport.DereferenceMedia(ctx, url, int64(maxsz))
+					return tsport.DereferenceMedia(ctx, url, maxsz)
 				},
 				info,
 			)
@@ -168,14 +168,14 @@ func (d *Dereferencer) RefreshMedia(
 			}
 
 			// Get maximum supported remote media size.
-			maxsz := config.GetMediaRemoteMaxSize()
+			maxsz := int64(config.GetMediaRemoteMaxSize()) // #nosec G115 -- Already validated.
 
 			// Recache media with prepared info,
 			// this will also update media in db.
 			return d.mediaManager.CacheMedia(
 				attach,
 				func(ctx context.Context) (io.ReadCloser, error) {
-					return tsport.DereferenceMedia(ctx, url, int64(maxsz))
+					return tsport.DereferenceMedia(ctx, url, maxsz)
 				},
 			), nil
 		},
diff --git a/internal/httpclient/client.go b/internal/httpclient/client.go
index 8a5f51c21..10fba5d42 100644
--- a/internal/httpclient/client.go
+++ b/internal/httpclient/client.go
@@ -340,14 +340,14 @@ func (c *Client) do(r *Request) (rsp *http.Response, retry bool, err error) {
 
 			if u, _ := strconv.ParseUint(after, 10, 32); u != 0 {
 				// An integer no. of backoff seconds was provided.
-				r.backoff = time.Duration(u) * time.Second
+				r.backoff = time.Duration(u) * time.Second // #nosec G115 -- We clamp backoff below.
 			} else if at, _ := http.ParseTime(after); !at.Before(now) {
 				// An HTTP formatted future date-time was provided.
 				r.backoff = at.Sub(now)
 			}
 
 			// Don't let their provided backoff exceed our max.
-			if max := baseBackoff * time.Duration(c.retries); //
+			if max := baseBackoff * time.Duration(c.retries); // #nosec G115 -- We control c.retries.
 			r.backoff > max {
 				r.backoff = max
 			}
diff --git a/internal/media/ffmpeg.go b/internal/media/ffmpeg.go
index 4baa3dbe5..f1c277934 100644
--- a/internal/media/ffmpeg.go
+++ b/internal/media/ffmpeg.go
@@ -556,10 +556,10 @@ func (res *ffprobeResult) Process() (*result, error) {
 				if p := strings.SplitN(str, "/", 2); len(p) == 2 {
 					n, _ := strconv.ParseUint(p[0], 10, 32)
 					d, _ := strconv.ParseUint(p[1], 10, 32)
-					num, den = uint32(n), uint32(d)
+					num, den = uint32(n), uint32(d) // #nosec G115 -- ParseUint is configured to check
 				} else {
 					n, _ := strconv.ParseUint(p[0], 10, 32)
-					num = uint32(n)
+					num = uint32(n) // #nosec G115 -- ParseUint is configured to check
 				}
 
 				// Set final divised framerate.
diff --git a/internal/media/imaging.go b/internal/media/imaging.go
index a9f73a066..6a0fa694c 100644
--- a/internal/media/imaging.go
+++ b/internal/media/imaging.go
@@ -399,9 +399,9 @@ func (s *scanner) scan(x1, y1, x2, y2 int, dst []uint8) {
 					g16 := uint16(s[1])
 					b16 := uint16(s[2])
 					a16 := uint16(a)
-					d[0] = uint8(r16 * 0xff / a16)
-					d[1] = uint8(g16 * 0xff / a16)
-					d[2] = uint8(b16 * 0xff / a16)
+					d[0] = uint8(r16 * 0xff / a16) // #nosec G115 -- Overflow desired.
+					d[1] = uint8(g16 * 0xff / a16) // #nosec G115 -- Overflow desired.
+					d[2] = uint8(b16 * 0xff / a16) // #nosec G115 -- Overflow desired.
 					d[3] = a
 				}
 				j += 4
@@ -431,9 +431,9 @@ func (s *scanner) scan(x1, y1, x2, y2 int, dst []uint8) {
 					g32 := uint32(s[2])<<8 | uint32(s[3])
 					b32 := uint32(s[4])<<8 | uint32(s[5])
 					a32 := uint32(s[6])<<8 | uint32(s[7])
-					d[0] = uint8((r32 * 0xffff / a32) >> 8)
-					d[1] = uint8((g32 * 0xffff / a32) >> 8)
-					d[2] = uint8((b32 * 0xffff / a32) >> 8)
+					d[0] = uint8((r32 * 0xffff / a32) >> 8) // #nosec G115 -- Overflow desired.
+					d[1] = uint8((g32 * 0xffff / a32) >> 8) // #nosec G115 -- Overflow desired.
+					d[2] = uint8((b32 * 0xffff / a32) >> 8) // #nosec G115 -- Overflow desired.
 				}
 				d[3] = a
 				j += 4
@@ -509,30 +509,30 @@ func (s *scanner) scan(x1, y1, x2, y2 int, dst []uint8) {
 				cr1 := int32(img.Cr[ic]) - 128
 
 				r := yy1 + 91881*cr1
-				if uint32(r)&0xff000000 == 0 {
+				if uint32(r)&0xff000000 == 0 { //nolint:gosec
 					r >>= 16
 				} else {
 					r = ^(r >> 31)
 				}
 
 				g := yy1 - 22554*cb1 - 46802*cr1
-				if uint32(g)&0xff000000 == 0 {
+				if uint32(g)&0xff000000 == 0 { //nolint:gosec
 					g >>= 16
 				} else {
 					g = ^(g >> 31)
 				}
 
 				b := yy1 + 116130*cb1
-				if uint32(b)&0xff000000 == 0 {
+				if uint32(b)&0xff000000 == 0 { //nolint:gosec
 					b >>= 16
 				} else {
 					b = ^(b >> 31)
 				}
 
 				d := dst[j : j+4 : j+4]
-				d[0] = uint8(r)
-				d[1] = uint8(g)
-				d[2] = uint8(b)
+				d[0] = uint8(r) // #nosec G115 -- Overflow desired.
+				d[1] = uint8(g) // #nosec G115 -- Overflow desired.
+				d[2] = uint8(b) // #nosec G115 -- Overflow desired.
 				d[3] = 0xff
 
 				iy++
@@ -569,9 +569,9 @@ func (s *scanner) scan(x1, y1, x2, y2 int, dst []uint8) {
 				d := dst[j : j+4 : j+4]
 				switch a16 {
 				case 0xffff:
-					d[0] = uint8(r16 >> 8)
-					d[1] = uint8(g16 >> 8)
-					d[2] = uint8(b16 >> 8)
+					d[0] = uint8(r16 >> 8) // #nosec G115 -- Overflow desired.
+					d[1] = uint8(g16 >> 8) // #nosec G115 -- Overflow desired.
+					d[2] = uint8(b16 >> 8) // #nosec G115 -- Overflow desired.
 					d[3] = 0xff
 				case 0:
 					d[0] = 0
@@ -579,10 +579,10 @@ func (s *scanner) scan(x1, y1, x2, y2 int, dst []uint8) {
 					d[2] = 0
 					d[3] = 0
 				default:
-					d[0] = uint8(((r16 * 0xffff) / a16) >> 8)
-					d[1] = uint8(((g16 * 0xffff) / a16) >> 8)
-					d[2] = uint8(((b16 * 0xffff) / a16) >> 8)
-					d[3] = uint8(a16 >> 8)
+					d[0] = uint8(((r16 * 0xffff) / a16) >> 8) // #nosec G115 -- Overflow desired.
+					d[1] = uint8(((g16 * 0xffff) / a16) >> 8) // #nosec G115 -- Overflow desired.
+					d[2] = uint8(((b16 * 0xffff) / a16) >> 8) // #nosec G115 -- Overflow desired.
+					d[3] = uint8(a16 >> 8)                    // #nosec G115 -- Overflow desired.
 				}
 				j += 4
 			}
@@ -617,7 +617,7 @@ func clampFloat(x float64) uint8 {
 		return 255
 	}
 	if v > 0 {
-		return uint8(v)
+		return uint8(v) // #nosec G115 -- Just checked.
 	}
 	return 0
 }
diff --git a/internal/media/refetch.go b/internal/media/refetch.go
index 5531f6d97..c467333c9 100644
--- a/internal/media/refetch.go
+++ b/internal/media/refetch.go
@@ -49,9 +49,6 @@ func (m *Manager) RefetchEmojis(ctx context.Context, domain string, dereferenceM
 		refetchIDs         []string
 	)
 
-	// Get max supported remote emoji media size.
-	maxsz := config.GetMediaEmojiRemoteMaxSize()
-
 	// page through emojis 20 at a time, looking for those with missing images
 	for {
 		// Fetch next block of emojis from database
@@ -111,8 +108,10 @@ func (m *Manager) RefetchEmojis(ctx context.Context, domain string, dereferenceM
 			continue
 		}
 
+		// Get max supported remote emoji media size.
+		maxsz := int64(config.GetMediaEmojiRemoteMaxSize()) // #nosec G115 -- Already validated.
 		dataFunc := func(ctx context.Context) (reader io.ReadCloser, err error) {
-			return dereferenceMedia(ctx, emojiImageIRI, int64(maxsz))
+			return dereferenceMedia(ctx, emojiImageIRI, maxsz)
 		}
 
 		processingEmoji, err := m.UpdateEmoji(ctx, emoji, dataFunc, AdditionalEmojiInfo{
diff --git a/internal/media/util.go b/internal/media/util.go
index 538d6f572..f6bf06260 100644
--- a/internal/media/util.go
+++ b/internal/media/util.go
@@ -145,7 +145,7 @@ func drainToTmp(rc io.ReadCloser) (string, error) {
 	// Check to see if limit was reached,
 	// (produces more useful error messages).
 	if lr != nil && lr.N <= 0 {
-		err := fmt.Errorf("reached read limit %s", bytesize.Size(limit))
+		err := fmt.Errorf("reached read limit %s", bytesize.Size(limit)) // #nosec G115 -- Just logging
 		return path, gtserror.SetLimitReached(err)
 	}
 
diff --git a/internal/middleware/logger.go b/internal/middleware/logger.go
index 097c73cbd..da5be9dfa 100644
--- a/internal/middleware/logger.go
+++ b/internal/middleware/logger.go
@@ -123,7 +123,7 @@ func Logger(logClientIP bool) gin.HandlerFunc {
 			}
 
 			// Generate a nicer looking bytecount
-			size := bytesize.Size(c.Writer.Size())
+			size := bytesize.Size(c.Writer.Size()) // #nosec G115 -- Just logging
 
 			// Finally, write log entry with status text + body size.
 			l.Logf(lvl, "%s: wrote %s", statusText, size)
diff --git a/internal/middleware/requestid.go b/internal/middleware/requestid.go
index 00b1ff299..7d98787a7 100644
--- a/internal/middleware/requestid.go
+++ b/internal/middleware/requestid.go
@@ -48,7 +48,7 @@ func NewRequestID() string {
 	b := make([]byte, 12)
 
 	// Get current time in milliseconds.
-	ms := uint64(time.Now().UnixMilli())
+	ms := uint64(time.Now().UnixMilli()) // #nosec G115 -- Pre-1970 clock?
 
 	// Store binary time data in byte buffer.
 	binary.LittleEndian.PutUint64(b[0:8], ms)
diff --git a/internal/middleware/throttling.go b/internal/middleware/throttling.go
index 33f46f175..739189b79 100644
--- a/internal/middleware/throttling.go
+++ b/internal/middleware/throttling.go
@@ -82,12 +82,16 @@ func Throttle(cpuMultiplier int, retryAfter time.Duration) gin.HandlerFunc {
 		return func(c *gin.Context) {}
 	}
 
+	if retryAfter < 0 {
+		retryAfter = 0
+	}
+
 	var (
 		limit         = runtime.GOMAXPROCS(0) * cpuMultiplier
 		queueLimit    = limit * cpuMultiplier
 		tokens        = make(chan token, limit)
 		requestCount  = atomic.Int64{}
-		retryAfterStr = strconv.FormatUint(uint64(retryAfter/time.Second), 10)
+		retryAfterStr = strconv.FormatUint(uint64(retryAfter/time.Second), 10) // #nosec G115 -- Checked right above
 	)
 
 	// prefill token channel
diff --git a/internal/processing/account/update.go b/internal/processing/account/update.go
index 58e52a992..2bdbf96f4 100644
--- a/internal/processing/account/update.go
+++ b/internal/processing/account/update.go
@@ -463,9 +463,10 @@ func (p *Processor) UpdateAvatar(
 ) {
 	// Get maximum supported local media size.
 	maxsz := config.GetMediaLocalMaxSize()
+	maxszInt64 := int64(maxsz) // #nosec G115 -- Already validated.
 
 	// Ensure media within size bounds.
-	if avatar.Size > int64(maxsz) {
+	if avatar.Size > maxszInt64 {
 		text := fmt.Sprintf("media exceeds configured max size: %s", maxsz)
 		return nil, gtserror.NewErrorBadRequest(errors.New(text), text)
 	}
@@ -478,7 +479,7 @@ func (p *Processor) UpdateAvatar(
 	}
 
 	// Wrap the multipart file reader to ensure is limited to max.
-	rc, _, _ := iotools.UpdateReadCloserLimit(mpfile, int64(maxsz))
+	rc, _, _ := iotools.UpdateReadCloserLimit(mpfile, maxszInt64)
 
 	// Write to instance storage.
 	return p.c.StoreLocalMedia(ctx,
@@ -508,9 +509,10 @@ func (p *Processor) UpdateHeader(
 ) {
 	// Get maximum supported local media size.
 	maxsz := config.GetMediaLocalMaxSize()
+	maxszInt64 := int64(maxsz) // #nosec G115 -- Already validated.
 
 	// Ensure media within size bounds.
-	if header.Size > int64(maxsz) {
+	if header.Size > maxszInt64 {
 		text := fmt.Sprintf("media exceeds configured max size: %s", maxsz)
 		return nil, gtserror.NewErrorBadRequest(errors.New(text), text)
 	}
@@ -523,7 +525,7 @@ func (p *Processor) UpdateHeader(
 	}
 
 	// Wrap the multipart file reader to ensure is limited to max.
-	rc, _, _ := iotools.UpdateReadCloserLimit(mpfile, int64(maxsz))
+	rc, _, _ := iotools.UpdateReadCloserLimit(mpfile, maxszInt64)
 
 	// Write to instance storage.
 	return p.c.StoreLocalMedia(ctx,
diff --git a/internal/processing/admin/emoji.go b/internal/processing/admin/emoji.go
index 70e196b95..5a7da445e 100644
--- a/internal/processing/admin/emoji.go
+++ b/internal/processing/admin/emoji.go
@@ -25,7 +25,6 @@ import (
 	"mime/multipart"
 	"strings"
 
-	"codeberg.org/gruf/go-bytesize"
 	"codeberg.org/gruf/go-iotools"
 	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
 	"github.com/superseriousbusiness/gotosocial/internal/config"
@@ -46,9 +45,10 @@ func (p *Processor) EmojiCreate(
 
 	// Get maximum supported local emoji size.
 	maxsz := config.GetMediaEmojiLocalMaxSize()
+	maxszInt64 := int64(maxsz) // #nosec G115 -- Already validated.
 
 	// Ensure media within size bounds.
-	if form.Image.Size > int64(maxsz) {
+	if form.Image.Size > maxszInt64 {
 		text := fmt.Sprintf("emoji exceeds configured max size: %s", maxsz)
 		return nil, gtserror.NewErrorBadRequest(errors.New(text), text)
 	}
@@ -61,7 +61,7 @@ func (p *Processor) EmojiCreate(
 	}
 
 	// Wrap the multipart file reader to ensure is limited to max.
-	rc, _, _ := iotools.UpdateReadCloserLimit(mpfile, int64(maxsz))
+	rc, _, _ := iotools.UpdateReadCloserLimit(mpfile, maxszInt64)
 	data := func(context.Context) (io.ReadCloser, error) {
 		return rc, nil
 	}
@@ -301,9 +301,10 @@ func (p *Processor) emojiUpdateCopy(
 
 	// Get maximum supported local emoji size.
 	maxsz := config.GetMediaEmojiLocalMaxSize()
+	maxszInt := int(maxsz) // #nosec G115 -- Already validated.
 
 	// Ensure target emoji image within size bounds.
-	if bytesize.Size(target.ImageFileSize) > maxsz {
+	if target.ImageFileSize > maxszInt {
 		text := fmt.Sprintf("emoji exceeds configured max size: %s", maxsz)
 		return nil, gtserror.NewErrorBadRequest(errors.New(text), text)
 	}
@@ -442,9 +443,10 @@ func (p *Processor) emojiUpdateModify(
 
 		// Get maximum supported local emoji size.
 		maxsz := config.GetMediaEmojiLocalMaxSize()
+		maxszInt64 := int64(maxsz) // #nosec G115 -- Already validated.
 
 		// Ensure media within size bounds.
-		if image.Size > int64(maxsz) {
+		if image.Size > maxszInt64 {
 			text := fmt.Sprintf("emoji exceeds configured max size: %s", maxsz)
 			return nil, gtserror.NewErrorBadRequest(errors.New(text), text)
 		}
@@ -457,7 +459,7 @@ func (p *Processor) emojiUpdateModify(
 		}
 
 		// Wrap the multipart file reader to ensure is limited to max.
-		rc, _, _ := iotools.UpdateReadCloserLimit(mpfile, int64(maxsz))
+		rc, _, _ := iotools.UpdateReadCloserLimit(mpfile, int64(maxsz)) // #nosec G115 -- Already validated.
 		data := func(context.Context) (io.ReadCloser, error) {
 			return rc, nil
 		}
diff --git a/internal/processing/media/create.go b/internal/processing/media/create.go
index b3a7d6052..ca1f1c3c6 100644
--- a/internal/processing/media/create.go
+++ b/internal/processing/media/create.go
@@ -36,9 +36,10 @@ func (p *Processor) Create(ctx context.Context, account *gtsmodel.Account, form
 
 	// Get maximum supported local media size.
 	maxsz := config.GetMediaLocalMaxSize()
+	maxszInt64 := int64(maxsz) // #nosec G115 -- Already validated.
 
 	// Ensure media within size bounds.
-	if form.File.Size > int64(maxsz) {
+	if form.File.Size > maxszInt64 {
 		text := fmt.Sprintf("media exceeds configured max size: %s", maxsz)
 		return nil, gtserror.NewErrorBadRequest(errors.New(text), text)
 	}
@@ -58,7 +59,7 @@ func (p *Processor) Create(ctx context.Context, account *gtsmodel.Account, form
 	}
 
 	// Wrap the multipart file reader to ensure is limited to max.
-	rc, _, _ := iotools.UpdateReadCloserLimit(mpfile, int64(maxsz))
+	rc, _, _ := iotools.UpdateReadCloserLimit(mpfile, maxszInt64)
 
 	// Create local media and write to instance storage.
 	attachment, errWithCode := p.c.StoreLocalMedia(ctx,
diff --git a/internal/transport/derefmedia.go b/internal/transport/derefmedia.go
index 873032f39..3a05fcbd6 100644
--- a/internal/transport/derefmedia.go
+++ b/internal/transport/derefmedia.go
@@ -53,7 +53,7 @@ func (t *transport) DereferenceMedia(ctx context.Context, iri *url.URL, maxsz in
 	// Check media within size limit.
 	if rsp.ContentLength > maxsz {
 		_ = rsp.Body.Close()       // close early.
-		sz := bytesize.Size(maxsz) // nicer log format
+		sz := bytesize.Size(maxsz) //nolint:gosec
 		return nil, gtserror.Newf("media body exceeds max size %s", sz)
 	}
 
diff --git a/internal/typeutils/internaltofrontend.go b/internal/typeutils/internaltofrontend.go
index 3b94687dc..1e20455c3 100644
--- a/internal/typeutils/internaltofrontend.go
+++ b/internal/typeutils/internaltofrontend.go
@@ -647,7 +647,7 @@ func (c *Converter) AttachmentToAPIAttachment(ctx context.Context, media *gtsmod
 			Size:      toAPISize(media.FileMeta.Original.Width, media.FileMeta.Original.Height),
 			FrameRate: toAPIFrameRate(media.FileMeta.Original.Framerate),
 			Duration:  util.PtrOrZero(media.FileMeta.Original.Duration),
-			Bitrate:   int(util.PtrOrZero(media.FileMeta.Original.Bitrate)),
+			Bitrate:   util.PtrOrZero(media.FileMeta.Original.Bitrate),
 		}
 
 		// Copy over local file URL.
@@ -1529,9 +1529,9 @@ func (c *Converter) InstanceToAPIV1Instance(ctx context.Context, i *gtsmodel.Ins
 		Version:              config.GetSoftwareVersion(),
 		Languages:            config.GetInstanceLanguages().TagStrs(),
 		Registrations:        config.GetAccountsRegistrationOpen(),
-		ApprovalRequired:     true,  // approval always required
-		InvitesEnabled:       false, // todo: not supported yet
-		MaxTootChars:         uint(config.GetStatusesMaxChars()),
+		ApprovalRequired:     true,                               // approval always required
+		InvitesEnabled:       false,                              // todo: not supported yet
+		MaxTootChars:         uint(config.GetStatusesMaxChars()), // #nosec G115 -- Already validated.
 		Rules:                c.InstanceRulesToAPIRules(i.Rules),
 		Terms:                i.Terms,
 		TermsRaw:             i.TermsText,
@@ -1551,9 +1551,9 @@ func (c *Converter) InstanceToAPIV1Instance(ctx context.Context, i *gtsmodel.Ins
 	instance.Configuration.Statuses.CharactersReservedPerURL = instanceStatusesCharactersReservedPerURL
 	instance.Configuration.Statuses.SupportedMimeTypes = instanceStatusesSupportedMimeTypes
 	instance.Configuration.MediaAttachments.SupportedMimeTypes = media.SupportedMIMETypes
-	instance.Configuration.MediaAttachments.ImageSizeLimit = int(config.GetMediaRemoteMaxSize())
+	instance.Configuration.MediaAttachments.ImageSizeLimit = int(config.GetMediaRemoteMaxSize()) // #nosec G115 -- Already validated.
 	instance.Configuration.MediaAttachments.ImageMatrixLimit = instanceMediaAttachmentsImageMatrixLimit
-	instance.Configuration.MediaAttachments.VideoSizeLimit = int(config.GetMediaRemoteMaxSize())
+	instance.Configuration.MediaAttachments.VideoSizeLimit = int(config.GetMediaRemoteMaxSize()) // #nosec G115 -- Already validated.
 	instance.Configuration.MediaAttachments.VideoFrameRateLimit = instanceMediaAttachmentsVideoFrameRateLimit
 	instance.Configuration.MediaAttachments.VideoMatrixLimit = instanceMediaAttachmentsVideoMatrixLimit
 	instance.Configuration.Polls.MaxOptions = config.GetStatusesPollMaxOptions()
@@ -1563,7 +1563,7 @@ func (c *Converter) InstanceToAPIV1Instance(ctx context.Context, i *gtsmodel.Ins
 	instance.Configuration.Accounts.AllowCustomCSS = config.GetAccountsAllowCustomCSS()
 	instance.Configuration.Accounts.MaxFeaturedTags = instanceAccountsMaxFeaturedTags
 	instance.Configuration.Accounts.MaxProfileFields = instanceAccountsMaxProfileFields
-	instance.Configuration.Emojis.EmojiSizeLimit = int(config.GetMediaEmojiLocalMaxSize())
+	instance.Configuration.Emojis.EmojiSizeLimit = int(config.GetMediaEmojiLocalMaxSize()) // #nosec G115 -- Already validated.
 	instance.Configuration.OIDCEnabled = config.GetOIDCEnabled()
 
 	// URLs
@@ -1695,9 +1695,9 @@ func (c *Converter) InstanceToAPIV2Instance(ctx context.Context, i *gtsmodel.Ins
 	instance.Configuration.Statuses.CharactersReservedPerURL = instanceStatusesCharactersReservedPerURL
 	instance.Configuration.Statuses.SupportedMimeTypes = instanceStatusesSupportedMimeTypes
 	instance.Configuration.MediaAttachments.SupportedMimeTypes = media.SupportedMIMETypes
-	instance.Configuration.MediaAttachments.ImageSizeLimit = int(config.GetMediaRemoteMaxSize())
+	instance.Configuration.MediaAttachments.ImageSizeLimit = int(config.GetMediaRemoteMaxSize()) // #nosec G115 -- Already validated.
 	instance.Configuration.MediaAttachments.ImageMatrixLimit = instanceMediaAttachmentsImageMatrixLimit
-	instance.Configuration.MediaAttachments.VideoSizeLimit = int(config.GetMediaRemoteMaxSize())
+	instance.Configuration.MediaAttachments.VideoSizeLimit = int(config.GetMediaRemoteMaxSize()) // #nosec G115 -- Already validated.
 	instance.Configuration.MediaAttachments.VideoFrameRateLimit = instanceMediaAttachmentsVideoFrameRateLimit
 	instance.Configuration.MediaAttachments.VideoMatrixLimit = instanceMediaAttachmentsVideoMatrixLimit
 	instance.Configuration.Polls.MaxOptions = config.GetStatusesPollMaxOptions()
@@ -1707,7 +1707,7 @@ func (c *Converter) InstanceToAPIV2Instance(ctx context.Context, i *gtsmodel.Ins
 	instance.Configuration.Accounts.AllowCustomCSS = config.GetAccountsAllowCustomCSS()
 	instance.Configuration.Accounts.MaxFeaturedTags = instanceAccountsMaxFeaturedTags
 	instance.Configuration.Accounts.MaxProfileFields = instanceAccountsMaxProfileFields
-	instance.Configuration.Emojis.EmojiSizeLimit = int(config.GetMediaEmojiLocalMaxSize())
+	instance.Configuration.Emojis.EmojiSizeLimit = int(config.GetMediaEmojiLocalMaxSize()) // #nosec G115 -- Already validated.
 	instance.Configuration.OIDCEnabled = config.GetOIDCEnabled()
 
 	// registrations