CVE-2026-106115: high-severity vulnerability in SixLabors ImageSharp
ImageSharp: TIFF CCITT T6 encoder writes beyond an undersized output buffer
Published
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.4%
exploitation probability
0.4%top 73% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
SixLabors · ImageSharpRelated CVEs — SixLabors ImageSharp
In the same product, most dangerous first.
CVE-2024-41132MEDIUMSixLabors ImageSharp Allows Excessive Memory Allocation in Gif DecoderEPSS 0.8%CVE-2024-41131HIGHOut-of-bounds Write in SixLabors ImageSharpEPSS 0.7%CVE-2024-32035MEDIUMMemory Allocation with Excessive Size Value in SixLabors.ImageSharpEPSS 0.6%CVE-2026-106118HIGHImageSharp: Tiled fax TIFF: tile buffer sized by TileWidth but fax decompressor writes scanlines of ImageWidth — heap OOB writeEPSS 0.6%CVE-2024-32036MEDIUMSixLabors.ImageSharp vulnerable to data leakageEPSS 0.6%CVE-2025-27598HIGHOut-of-bounds Write in SixLabors ImageSharpEPSS 0.6%