{"id":"CVE-2026-106116","state":"PUBLISHED","title":"ImageSharp: BigTIFF IFD count can keep a decoder thread in a non-progressing loop","description":"ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, ExifReader.ReadValues64 trusts the 64-bit BigTIFF IFD entry count and iterates once per declared entry. When fewer than 20 bytes remain, ExifReader.ReadValue64 returns without advancing the stream or terminating the outer loop, so a small malformed BigTIFF can keep one decoder thread executing for an attacker-controlled duration. This report does not claim worker-pool exhaustion. This issue is fixed in version 4.1.2.","publishedAt":"2026-10-06T17:51:36.366Z","updatedAt":"2026-10-06T18:21:55.088Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["SixLabors ImageSharp"],"affected":[{"vendor":"SixLabors","product":"ImageSharp","versions":[{"version":">= 2.0.0, < 4.1.2","status":"affected"}]}],"references":["https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-wmxv-xphr-5c9g","https://github.com/SixLabors/ImageSharp/pull/3187","https://github.com/SixLabors/ImageSharp/commit/92b12d72550ebb6be5b1e22e559c361fd863a6ec","https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2"],"weaknesses":["CWE-835"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/106xxx/CVE-2026-106116.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-106116","state":"PUBLISHED","datePublished":"2026-10-06T17:51:36.366Z","dateUpdated":"2026-10-06T18:21:55.088Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-06T15:33:55.333Z"},"containers":{"cna":{"title":"ImageSharp: BigTIFF IFD count can keep a decoder thread in a non-progressing loop","descriptions":[{"lang":"en","value":"ImageSharp is a 2D graphics library. From 2.0.0 until 4.1.2, ExifReader.ReadValues64 trusts the 64-bit BigTIFF IFD entry count and iterates once per declared entry. When fewer than 20 bytes remain, ExifReader.ReadValue64 returns without advancing the stream or terminating the outer loop, so a small malformed BigTIFF can keep one decoder thread executing for an attacker-controlled duration. This report does not claim worker-pool exhaustion. This issue is fixed in version 4.1.2."}],"affected":[{"vendor":"SixLabors","product":"ImageSharp","versions":[{"version":">= 2.0.0, < 4.1.2","status":"affected"}]}],"references":[{"url":"https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-wmxv-xphr-5c9g","name":"https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-wmxv-xphr-5c9g","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/SixLabors/ImageSharp/pull/3187","name":"https://github.com/SixLabors/ImageSharp/pull/3187","tags":["x_refsource_MISC"]},{"url":"https://github.com/SixLabors/ImageSharp/commit/92b12d72550ebb6be5b1e22e559c361fd863a6ec","name":"https://github.com/SixLabors/ImageSharp/commit/92b12d72550ebb6be5b1e22e559c361fd863a6ec","tags":["x_refsource_MISC"]},{"url":"https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2","name":"https://github.com/SixLabors/ImageSharp/releases/tag/v4.1.2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","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:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-835","lang":"en","description":"CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-06T17:51:36.366Z"},"source":{"advisory":"GHSA-wmxv-xphr-5c9g","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/SixLabors/ImageSharp/security/advisories/GHSA-wmxv-xphr-5c9g","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-06T18:21:43.778832Z","id":"CVE-2026-106116","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-06T18:21:55.088Z"}}]}}}