fix(deps): update module golang.org/x/image to v0.41.0 [security]

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
golang.org/x/image	v0.38.0 → v0.41.0

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golang.org/x/image/tiff has excessive resource consumption in PackBits decompression

CVE-2026-46599 / GHSA-q675-qj96-32m9

More information

Details

The TIFF decoder does not place a limit on the size of PackBits-compressed data. A maliciously-crafted image can exploit this to cause a small image (both in terms of pixel width/height and encoded size) to make the decoder decode large amounts of compressed data.

Severity

• CVSS Score: 7.5 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

• https://nvd.nist.gov/vuln/detail/CVE-2026-46599
• https://go.dev/cl/759960
• https://go.dev/issue/79577
• https://groups.google.com/g/golang-announce/c/uhYX90BlBvI
• https://pkg.go.dev/vuln/GO-2026-5032
• https://github.com/advisories/GHSA-q675-qj96-32m9

This data is provided by the GitHub Advisory Database (CC-BY 4.0).

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[renovate]

ℹ️ Artifact update notice

File name: go.mod

In order to perform the update(s) described in the table above, Renovate ran the go get command, which resulted in the following additional change(s):

• 1 additional dependency was updated

Details:

Package	Change
golang.org/x/text	v0.35.0 -> v0.37.0

[github-actions]

Renovate PR Review Results

⚖️ Safety Assessment: ✅ Safe

🔍 Release Content Analysis

Security Fix (Primary change)

• CVE-2026-46599 / GHSA-q675-qj96-32m9: TIFF decoder (golang.org/x/image/tiff) does not limit the amount of PackBits-compressed data it decompresses. A maliciously crafted image that is small in both pixel dimensions and encoded size can force the decoder to expand massive amounts of data, causing a Denial-of-Service. CVSS score: 7.5 (High). Fixed in v0.41.0 by adding a decompression size limit.

Indirect dependency bump

• golang.org/x/text updated from v0.35.0 → v0.37.0 (transitive dependency of golang.org/x/image). No API changes relevant to this project.

Breaking changes

• None identified. The draw package API is stable across v0.38.0–v0.41.0. All existing symbols (ApproxBiLinear, Src, Scale, etc.) remain unchanged.

🎯 Impact Scope Investigation

Package usage in this codebase

• golang.org/x/image/draw is imported at internal/gat/gat.go:25
• Used at internal/gat/gat.go:326 via draw.ApproxBiLinear.Scale(dst, dst.Bounds(), img, img.Bounds(), draw.Src, nil) for resizing images before Sixel encoding
• No other sub-packages from golang.org/x/image are imported (notably, golang.org/x/image/tiff is not imported)

CVE exposure

• The project is not directly exposed to CVE-2026-46599: it registers only image/gif, image/jpeg, and image/png decoders (standard library); the vulnerable golang.org/x/image/tiff decoder is never loaded. Updating is still correct hygiene.

Impact on other dependencies

• The bump to golang.org/x/text v0.37.0 is a minor patch with no public API changes relevant to this codebase.
• No other dependencies are affected.

💡 Recommended Actions

• No code changes required. The draw package API is unchanged; existing call sites compile and behave identically.
• Merge the PR as-is. The update resolves a publicly disclosed vulnerability (even though this project is not directly exposed) and carries zero migration cost.
• Optionally, run go test ./... post-merge to confirm no regressions (standard due diligence).

🔗 Reference Links

• CVE-2026-46599 on NVD
• GHSA-q675-qj96-32m9 Advisory
• Go Issue #79577
• Go CL 759960 (fix)
• golang.org/x/image vuln entry GO-2026-5032
• golang.org/x/image/draw package docs (v0.41.0)

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