CVE-2026-106115ImageSharp: TIFF CCITT T6 encoder writes beyond an undersized output buffer
Updated under an hour ago ()
Does this affect you?
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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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
- 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
SixLabors ImageSharp sixlabors:imagesharp (from the name) | from 2.1.0, < 4.1.2 | CNA record |
References
- https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-jjfr-hcj7-qf5wx-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.