Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
SixLabors.ImageSharp versions before 2.1.11, and versions 3.0.0 up to but not including 3.1.11, are vulnerable. A specially crafted GIF file with a malformed comment extension block, missing its block terminator, can cause the GIF decoder to loop indefinitely, leading to denial of service; the attacker needs only to supply such a file to an application that decodes untrusted GIF input. Upgrade to version 2.1.11 or 3.1.11. No workaround is listed.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.3 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0045, the 39th percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 30 Jul 2025, 09:14 UTC Published by the maintainers as a GitHub repository advisory
- 31 Oct 2026, 15:22 UTC First seen by agentprime
- 31 Oct 2026, 15:22 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-rxmq-m78w-7wmc
- OSV: GHSA-rxmq-m78w-7wmc
- github.com/SixLabors/ImageSharp/security/advisories/GHSA-rxmq-m78w-7wmc
- nvd.nist.gov/vuln/detail/CVE-2025-54575
- github.com/SixLabors/ImageSharp/issues/2953
- github.com/SixLabors/ImageSharp/commit/55e49262df9a057dff9b7807ed1b7bdb49187c3f
- github.com/SixLabors/ImageSharp/commit/833f3ceec35af6b775950e06f03b934546cefbf6
- github.com/SixLabors/ImageSharp