{"id":"CVE-2026-106110","summary":"ImageSharp: TIFF CCITT T4 encoder can write past its compressed output buffer","details":"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.","aliases":["GHSA-j9gm-c75j-xc9q"],"modified":"2026-10-08T02:50:33.605774390Z","published":"2026-10-06T17:42:02.099Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106110.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-787"]},"references":[{"type":"WEB","url":"https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106110.json"},{"type":"ADVISORY","url":"https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-j9gm-c75j-xc9q"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106110"},{"type":"FIX","url":"https://github.com/SixLabors/ImageSharp/commit/a9498c6db3642ef92c712ebc81e706914ac16a95"},{"type":"FIX","url":"https://github.com/SixLabors/ImageSharp/pull/3187"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/sixlabors/imagesharp","events":[{"introduced":"5d6f3893baad0defd9d1a45b31275fedcd6a63e9"},{"fixed":"a9498c6db3642ef92c712ebc81e706914ac16a95"},{"fixed":"dee414097e4be7bb35ef0209cf96bd0b61a7133a"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"2.0.0"},{"fixed":"4.1.2"}]}}],"versions":["v4.1.1","v4.1.0","v4.0.0","v3.1.0","v3.0.1","v3.0.0","v2.1.1","v2.1.0","v2.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-106110.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"}]}