CVE-2026-106110: 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 2.0.0 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 products

• Sixlabors Imagesharp: from 2.0.0, before 4.1.2 (fixed in 4.1.2)

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