CVE-2026-106110: ImageSharp: TIFF CCITT T4 encoder can write past its compressed output buffer
(updated )
ImageSharp’s TIFF CCITT Group 3 (T4) encoder can write beyond its allocated compressed-data buffer when encoding narrow 1-bit images. The unchecked writes can corrupt process memory and terminate the process.
This report concerns only the T4 CcittGroup3Fax encoder path. It replaces the prior, unrelated ICC content.
References
- github.com/SixLabors/ImageSharp/commit/a9498c6db3642ef92c712ebc81e706914ac16a95
- github.com/SixLabors/ImageSharp/commit/baa37cd19077b2a2a0c5667535111cf31d48c019
- github.com/SixLabors/ImageSharp/pull/3187
- github.com/SixLabors/ImageSharp/pull/3208
- github.com/SixLabors/ImageSharp/releases/tag/v3.2.0
- github.com/SixLabors/ImageSharp/releases/tag/v4.1.2
- github.com/SixLabors/ImageSharp/security/advisories/GHSA-j9gm-c75j-xc9q
- github.com/advisories/GHSA-j9gm-c75j-xc9q
- nvd.nist.gov/vuln/detail/CVE-2026-106110
Code Behaviors & Features
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