Buffer overflow in Sixlabors Imagesharp
CVE-2026-106115
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Sixlabors Imagesharp — versions >= 2.1.0, < 4.1.2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-106115?
- CVE-2026-106115 is a high-severity vulnerability in Sixlabors Imagesharp, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2026-10-06.
- How severe is CVE-2026-106115?
- High severity. CVSS v3 base score is 7.5 out of 10.