high7.5
CVE-2026-106110
ImageSharp: TIFF CCITT T4 encoder can write past its compressed output buffer
Impact
ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, the TIFF CCITT Group 3 encoder allocates an undersized compressed-data buffer for narrow 1-bit images. TiffCcittCompressor.Initialize does not reserve enough space for the row data and T4 end-of-line codes, and T4BitCompressor.CompressStrip reaches unchecked writes when TiffCompression.CcittGroup3Fax is selected directly or inherited from decoded TIFF metadata. An attacker-controlled encode or decode-and-re-encode flow can write beyond the logical output span, corrupt process memory, and terminate the process. This issue is fixed in version 4.1.2.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | SixLabors.ImageSharp | >= 2.0.0, < 3.2.0 | 3.2.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Sixlabors | Imagesharp | from 2.0.0 before 3.2.0 from 4.0.0 before 4.1.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-j9gm-c75j-xc9q
- https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-j9gm-c75j-xc9q
- https://nvd.nist.gov/vuln/detail/CVE-2026-106110
- https://github.com/SixLabors/ImageSharp/pull/3187
- https://github.com/SixLabors/ImageSharp/commit/a9498c6db3642ef92c712ebc81e706914ac16a95
- https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2
- https://github.com/SixLabors/ImageSharp/pull/3208
- https://github.com/SixLabors/ImageSharp/commit/baa37cd19077b2a2a0c5667535111cf31d48c019
- https://github.com/SixLabors/ImageSharp/releases/tag/v3.2.0