CVE-2026-59956

{"id": "CVE-2026-59956", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-59956", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-18T17:41:21.102766Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"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"}, "impactScore": 4.2, "exploitabilityScore": 1.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"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"}]}]}], "published": "2026-09-18T16:17:07.290", "references": [{"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/f01bd16764b2a06f372899e3e302280a7f9c8c02", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5251", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.0.20.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.15.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-hjfv-gvxc-qgvh", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-hjfv-gvxc-qgvh", "tags": ["Exploit", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-125"}]}], "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."}], "lastModified": "2026-09-29T18:56:57.197", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "73B99192-DDBA-44C1-8523-9340D43C984C", "versionEndExcluding": "3.0.20.0"}, {"criteria": "cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7503FA78-FD87-4150-A118-E1A85C2DF645", "versionEndIncluding": "3.1.15.0", "versionStartIncluding": "3.1.0.0"}, {"criteria": "cpe:2.3:a:openimageio:openimageio:3.2.0.0:dev:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F43FE0AC-4CFC-485D-8370-37336EB2CEA0"}, {"criteria": "cpe:2.3:a:openimageio:openimageio:3.2.0.2:dev:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "450296D8-74F5-4847-8433-FE3DFB16C58E"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}