Package vulnerability, severity high

github.com/imgproxy/imgproxy/v3: imgproxy has unbounded memory allocation in ICO loader that allows unauthenticated memory-exhaustion DoS via crafted data_size…

Published October 30, 2026, updated October 31, 2026

imgproxy has unbounded memory allocation in ICO loader that allows unauthenticated memory-exhaustion DoS via crafted data_size field. Source: GHSA-mmq5-xm89-9pfg.

What's affected

• github.com/imgproxy/imgproxy/v3 (go)>=3.3.0 <4.0.16

What to do

1. Upgrade github.com/imgproxy/imgproxy/v3 to 4.0.16 or later.

Check whether you were affected

Pharon tells teams automatically when this affects something they run. To check a machine, run this in Claude Code with the Pharon plugin, in the repository that uses it:

/pharon:check-incident ghsa-mmq5-xm89-9pfg

References

• https://osv.dev/vulnerability/GHSA-mmq5-xm89-9pfg
• https://github.com/imgproxy/imgproxy/security/advisories/GHSA-mmq5-xm89-9pfg
• https://github.com/imgproxy/imgproxy/commit/a821b6a4cb07a1bf2bb9077431d1c1e734d79917
• https://github.com/imgproxy/imgproxy
• https://github.com/imgproxy/imgproxy/releases/tag/v4.0.16

Notice ghsa-mmq5-xm89-9pfg, signed with key feed-prod-2026-10 (Ed25519). The Pharon CLI verifies the signature before using a notice.