CVE-2026-59956

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-59956", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-07-07T18:49:15.607Z", "datePublished": "2026-09-18T15:33:22.599Z", "dateUpdated": "2026-09-18T17:41:48.491Z"}, "containers": {"cna": {"title": "OpenImageIO: Heap-buffer-overread in IffInput::readimg() when ZBUFFER flag is set", "problemTypes": [{"descriptions": [{"cweId": "CWE-125", "lang": "en", "description": "CWE-125: Out-of-bounds Read", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H", "version": "3.1"}}], "references": [{"name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-hjfv-gvxc-qgvh", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-hjfv-gvxc-qgvh"}, {"name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5251", "tags": ["x_refsource_MISC"], "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5251"}, {"name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/f01bd16764b2a06f372899e3e302280a7f9c8c02", "tags": ["x_refsource_MISC"], "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/f01bd16764b2a06f372899e3e302280a7f9c8c02"}, {"name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.20.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.20.0"}, {"name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.15.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.15.0"}], "affected": [{"vendor": "AcademySoftwareFoundation", "product": "OpenImageIO", "versions": [{"version": "< 3.0.20.0", "status": "affected"}, {"version": ">= 3.1.0.0, < 3.1.15.0", "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": "2026-09-18T15:33:22.599Z"}, "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 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1, An uncompressed 16-bit iff image with a z-buffer makes iffinput::readimg() allocate a temporary scanline from m_header.rgba_count but copy from it using m_header.pixel_bytes(), whose stride also includes z-buffer bytes. the oversized memcpy reads beyond the temporary heap buffer and copies adjacent memory into the output image, resulting in a crash or disclosure of adjacent heap data. The affected implementation is identified by src/iff.imageio/iffinput.cpp, IffInput::readimg(), m_header.rgba_count, and m_header.pixel_bytes(), which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1."}], "source": {"advisory": "GHSA-hjfv-gvxc-qgvh", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-hjfv-gvxc-qgvh", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-18T17:41:21.102766Z", "id": "CVE-2026-59956", "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": "2026-09-18T17:41:48.491Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-59956", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-18T17:41:21.102766Z"}}}], "references": [{"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-hjfv-gvxc-qgvh", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-18T17:41:42.807Z"}}], "cna": {"title": "OpenImageIO: Heap-buffer-overread in IffInput::readimg() when ZBUFFER flag is set", "source": {"advisory": "GHSA-hjfv-gvxc-qgvh", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.1, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}], "affected": [{"vendor": "AcademySoftwareFoundation", "product": "OpenImageIO", "versions": [{"status": "affected", "version": "< 3.0.20.0"}, {"status": "affected", "version": ">= 3.1.0.0, < 3.1.15.0"}, {"status": "affected", "version": ">= 3.2.0.0-dev, < 3.2.0.3-beta1"}]}], "references": [{"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-hjfv-gvxc-qgvh", "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-hjfv-gvxc-qgvh", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5251", "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5251", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/f01bd16764b2a06f372899e3e302280a7f9c8c02", "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/f01bd16764b2a06f372899e3e302280a7f9c8c02", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.20.0", "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.20.0", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.15.0", "name": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.15.0", "tags": ["x_refsource_MISC"]}], "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 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1, An uncompressed 16-bit iff image with a z-buffer makes iffinput::readimg() allocate a temporary scanline from m_header.rgba_count but copy from it using m_header.pixel_bytes(), whose stride also includes z-buffer bytes. the oversized memcpy reads beyond the temporary heap buffer and copies adjacent memory into the output image, resulting in a crash or disclosure of adjacent heap data. The affected implementation is identified by src/iff.imageio/iffinput.cpp, IffInput::readimg(), m_header.rgba_count, and m_header.pixel_bytes(), which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125: Out-of-bounds Read"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-18T15:33:22.599Z"}}}, "cveMetadata": {"cveId": "CVE-2026-59956", "state": "PUBLISHED", "dateUpdated": "2026-09-18T17:41:48.491Z", "dateReserved": "2026-07-07T18:49:15.607Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-09-18T15:33:22.599Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "OpenImageIO", "vendor": "AcademySoftwareFoundation", "versions": [{"status": "affected", "version": "< 3.0.20.0"}, {"status": "affected", "version": ">= 3.1.0.0, < 3.1.15.0"}, {"status": "affected", "version": ">= 3.2.0.0-dev, < 3.2.0.3-beta1"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:*", "matchCriteriaId": "73B99192-DDBA-44C1-8523-9340D43C984C", "versionEndExcluding": "3.0.20.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:*", "matchCriteriaId": "7503FA78-FD87-4150-A118-E1A85C2DF645", "versionEndIncluding": "3.1.15.0", "versionStartIncluding": "3.1.0.0", "vulnerable": true}, {"criteria": "cpe:2.3:a:openimageio:openimageio:3.2.0.0:dev:*:*:*:*:*:*", "matchCriteriaId": "F43FE0AC-4CFC-485D-8370-37336EB2CEA0", "vulnerable": true}, {"criteria": "cpe:2.3:a:openimageio:openimageio:3.2.0.2:dev:*:*:*:*:*:*", "matchCriteriaId": "450296D8-74F5-4847-8433-FE3DFB16C58E", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1, An uncompressed 16-bit iff image with a z-buffer makes iffinput::readimg() allocate a temporary scanline from m_header.rgba_count but copy from it using m_header.pixel_bytes(), whose stride also includes z-buffer bytes. the oversized memcpy reads beyond the temporary heap buffer and copies adjacent memory into the output image, resulting in a crash or disclosure of adjacent heap data. The affected implementation is identified by src/iff.imageio/iffinput.cpp, IffInput::readimg(), m_header.rgba_count, and m_header.pixel_bytes(), which define the relevant source path, functions, state, and trigger. This issue is fixed in versions 3.0.20.0, 3.1.15.0, and 3.2.0.3-beta1."}], "id": "CVE-2026-59956", "lastModified": "2026-09-29T18:56:57.197", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 6.1, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 4.2, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-59956", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-09-18T17:41:21.102766Z", "version": "2.0.3"}}]}, "published": "2026-09-18T16:17:07.290", "references": [{"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/f01bd16764b2a06f372899e3e302280a7f9c8c02"}, {"source": "security-advisories@github.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5251"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.20.0"}, {"source": "security-advisories@github.com", "tags": ["Release Notes"], "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.15.0"}, {"source": "security-advisories@github.com", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-hjfv-gvxc-qgvh"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Vendor Advisory"], "url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-hjfv-gvxc-qgvh"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,3.0.20.0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[3.1.0.0,3.1.15.0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[3.2.0.0-dev,3.2.0.3-beta1)"}}], "enrichment": {"confidence": 84.0, "confidence_source": "matching", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 84.0, "source": "matching"}]}, "original": {"product": "OpenImageIO", "source": "cna", "vendor": "AcademySoftwareFoundation"}, "product": "openimageio", "vendor": "academysoftwarefoundation"}], "created": "2026-09-18T22:30:15.636279+00:00", "updated": "2026-09-19T22:15:05.234323+00:00", "vendors": ["academysoftwarefoundation", "academysoftwarefoundation$PRODUCT$openimageio"]}