Buffer overflow in Sixlabors Imagesharp
CVE-2026-106117
ImageSharp is a 2D graphics library. From 3.0.0 until 4.1.1, decoding a strip TIFF using CCITT Group 3 or Modified Huffman compression can pass attacker-expanded runs to BitWriterUtils.WriteBits without first checking the current row width. T4TiffCompression.WritePixelRun can accumulate oversized makeup-code runs, and ModifiedHuffmanTiffCompression.Decompress validates the width only after writing. The unchecked writes can overflow the strip buffer, corrupt heap memory, and terminate the process. This strip-path vulnerability is distinct from the tiled decompressor-width mismatch. This issue is fixed in version 4.1.1.
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 >= 3.0.0, < 4.1.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-106117?
- CVE-2026-106117 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-2026-106117?
- High severity. CVSS v3 base score is 7.5 out of 10.