{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63638","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-17T14:11:15.482Z","datePublished":"2026-09-18T15:47:53.721Z","dateUpdated":"2026-09-22T14:48:04.230Z"},"containers":{"cna":{"title":"OpenImageIO: Cineon invalid bit depth heap out-of-bounds write","problemTypes":[{"descriptions":[{"cweId":"CWE-787","lang":"en","description":"CWE-787: Out-of-bounds Write","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":8.3,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:H","version":"3.1"}}],"references":[{"name":"https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-9hxv-jvgr-3x8g","tags":["x_refsource_CONFIRM"],"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-9hxv-jvgr-3x8g"},{"name":"https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5283","tags":["x_refsource_MISC"],"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5283"},{"name":"https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/6f2b2e85b3b3933ccc5a46303d5535f99bfa39fb","tags":["x_refsource_MISC"],"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/6f2b2e85b3b3933ccc5a46303d5535f99bfa39fb"},{"name":"https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.21.0","tags":["x_refsource_MISC"],"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.21.0"},{"name":"https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0","tags":["x_refsource_MISC"],"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0"}],"affected":[{"vendor":"AcademySoftwareFoundation","product":"OpenImageIO","versions":[{"version":"< 3.0.21.0","status":"affected"},{"version":">= 3.1.0.0, < 3.1.16.0","status":"affected"},{"version":">= 3.2.0.0-dev, < 3.2.0.3-beta1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-09-18T15:47:53.721Z"},"descriptions":[{"lang":"en","value":"OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1, A crafted cineon image can declare unsupported component bit depth 26. cineoninput::open() maps it to a 32-bit imagespec, but libcineon maps the unsupported depth to an 8-byte value, so cineoninput::read_native_scanline() causes attacker-controlled data to be written beyond the 4-byte-per-pixel caller buffer, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/cineon.imageio/cineoninput.cpp, CineonInput::open(), CineonInput::read_native_scanline(), ComponentDataSize(), bit depth 26, and ImageSpec, which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.21.0, 3.1.16.0, and 3.2.0.3-beta1."}],"source":{"advisory":"GHSA-9hxv-jvgr-3x8g","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-9hxv-jvgr-3x8g","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-22T14:47:37.944039Z","id":"CVE-2026-63638","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-22T14:48:04.230Z"}}]}}