ImageMagick: Heap Buffer Over-read in WaveletDenoise when processing small images

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

• CISA KEV Not listed.
• EPSS 0.0016, the 5th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 15:22 UTC First seen by agentprime
2. 31 Oct 2026, 15:22 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-qpgx-jfcq-r59f
• OSV: GHSA-qpgx-jfcq-r59f
• github.com/ImageMagick/ImageMagick/security/advisories/GHSA-qpgx-jfcq-r59f
• nvd.nist.gov/vuln/detail/CVE-2026-27798
• github.com/ImageMagick/ImageMagick/commit/0377e60b3c0d766bd7271221c95d9ee54f6a3738
• github.com/ImageMagick/ImageMagick
• github.com/dlemstra/Magick.NET/releases/tag/14.10.3

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.