CVE-2026-106115: Sixlabors Imagesharp

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

ImageSharp is a 2D graphics library. From 2.1.0 until 4.1.2, the TIFF CCITT Group 4 encoder allocates Width times rowsPerStrip bytes even though T6BitCompressor.CompressStrip can emit encoded row data and two 12-bit end-of-facsimile-block codes beyond that capacity. TiffCcittCompressor.WriteCode performs unchecked writes, and a decode-and-re-encode flow can inherit TiffCompression.CcittGroup4Fax and one-bit metadata from attacker-supplied input. The resulting out-of-bounds writes can corrupt memory and terminate the process. This issue is fixed in version 4.1.2.

Affected products

• Sixlabors Imagesharp: from 2.1.0, before 4.1.2 (fixed in 4.1.2)

Published 2026-10-06. Last modified 2026-10-09.