{"id":"CVE-2026-106118","state":"PUBLISHED","title":"ImageSharp: Tiled fax TIFF: tile buffer sized by TileWidth but fax decompressor writes scanlines of ImageWidth — heap OOB write","description":"ImageSharp is a 2D graphics library. From 3.0.0 until 4.1.1, tiled TIFF decoding allocates a destination buffer using TileWidth but TiffDecompressorsFactory.Create constructs T4, T6, and Modified Huffman decompressors using the full frame width. TiffDecoderCore.DecodeTilesChunky can therefore direct frame-width fax scanlines into a tile-width buffer when TileWidth is smaller than ImageWidth. The mismatch causes attacker-controlled out-of-bounds writes, heap corruption, and process termination even with legal per-row run codes. This tiled-path vulnerability is distinct from oversized CCITT runs in strip decoding. This issue is fixed in version 4.1.1.","publishedAt":"2026-10-06T17:59:02.778Z","updatedAt":"2026-10-06T19:29:39.226Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["SixLabors ImageSharp"],"affected":[{"vendor":"SixLabors","product":"ImageSharp","versions":[{"version":">= 3.0.0, < 4.1.1","status":"affected"}]}],"references":["https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-v76p-62qx-wwq2","https://github.com/SixLabors/ImageSharp/pull/3176","https://github.com/SixLabors/ImageSharp/commit/9ee7d1dd5b62d8c9f16cc755e76828386bc2191f","https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.1"],"weaknesses":["CWE-787"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/106xxx/CVE-2026-106118.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-106118","state":"PUBLISHED","datePublished":"2026-10-06T17:59:02.778Z","dateUpdated":"2026-10-06T19:29:39.226Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-06T15:33:55.333Z"},"containers":{"cna":{"title":"ImageSharp: Tiled fax TIFF: tile buffer sized by TileWidth but fax decompressor writes scanlines of ImageWidth — heap OOB write","descriptions":[{"lang":"en","value":"ImageSharp is a 2D graphics library. From 3.0.0 until 4.1.1, tiled TIFF decoding allocates a destination buffer using TileWidth but TiffDecompressorsFactory.Create constructs T4, T6, and Modified Huffman decompressors using the full frame width. TiffDecoderCore.DecodeTilesChunky can therefore direct frame-width fax scanlines into a tile-width buffer when TileWidth is smaller than ImageWidth. The mismatch causes attacker-controlled out-of-bounds writes, heap corruption, and process termination even with legal per-row run codes. This tiled-path vulnerability is distinct from oversized CCITT runs in strip decoding. This issue is fixed in version 4.1.1."}],"affected":[{"vendor":"SixLabors","product":"ImageSharp","versions":[{"version":">= 3.0.0, < 4.1.1","status":"affected"}]}],"references":[{"url":"https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-v76p-62qx-wwq2","name":"https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-v76p-62qx-wwq2","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/SixLabors/ImageSharp/pull/3176","name":"https://github.com/SixLabors/ImageSharp/pull/3176","tags":["x_refsource_MISC"]},{"url":"https://github.com/SixLabors/ImageSharp/commit/9ee7d1dd5b62d8c9f16cc755e76828386bc2191f","name":"https://github.com/SixLabors/ImageSharp/commit/9ee7d1dd5b62d8c9f16cc755e76828386bc2191f","tags":["x_refsource_MISC"]},{"url":"https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.1","name":"https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787: Out-of-bounds Write","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-06T17:59:02.778Z"},"source":{"advisory":"GHSA-v76p-62qx-wwq2","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-06T19:27:52.241408Z","id":"CVE-2026-106118","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-06T19:29:39.226Z"}}]}}}