{"id":"CVE-2026-106117","summary":"ImageSharp: CCITT fax decompression (T4/Modified Huffman): unbounded WriteBits overflows strip buffer — heap OOB write in SixLabors.ImageSharp","details":"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.","aliases":["GHSA-jj3q-cwqj-842r"],"modified":"2026-10-07T10:30:22.931879313Z","published":"2026-10-06T17:53:46.448Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-787"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106117.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106117.json"},{"type":"FIX","url":"https://github.com/SixLabors/ImageSharp/commit/e8892ecd8a95dee95c4480fda51cfe0b32f3b846"},{"type":"FIX","url":"https://github.com/SixLabors/ImageSharp/pull/3176"},{"type":"WEB","url":"https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.1"},{"type":"ADVISORY","url":"https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-jj3q-cwqj-842r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106117"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/sixlabors/imagesharp","events":[{"introduced":"6ec1692ee295923d9d40956befd4417d6735507b"},{"fixed":"0815358f9202a78bc7f3b83e19282dc3654b500f"}],"database_specific":{"extracted_events":[{"introduced":"3.0.0"},{"fixed":"4.1.1"}],"source":"AFFECTED_FIELD"}}],"versions":["v4.1.0","v4.0.0","v3.1.0","v3.0.1","v3.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-106117.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}