High 7.5Published Oct 6, 2026

CVE-2026-106110ImageSharp: TIFF CCITT T4 encoder can write past its compressed output buffer

Updated under an hour ago (2026-10-19 07:30 UTC)

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It affects SixLabors ImageSharp. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.35%, higher than 27% of scored CVEs.

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Every CVE for SixLabors ImageSharp

Exploited in the last 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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.35% (percentile 27)
Assigned by: GitHub_M
NVD analysis: Undergoing Analysis
Record last updated: Oct 9, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

SixLabors ImageSharp sixlabors:imagesharp (from the name)	from 2.0.0, < 4.1.2	CNA record

References

https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-j9gm-c75j-xc9qx-refsource-confirm
https://github.com/SixLabors/ImageSharp/pull/3187x-refsource-misc
https://github.com/SixLabors/ImageSharp/commit/a9498c6db3642ef92c712ebc81e706914ac16a95x-refsource-misc
https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.