CVE-2026-67549

{"id": "CVE-2026-67549", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-67549", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-09-24T20:57:34.673424Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.6, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 4.7, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "AcademySoftwareFoundation", "product": "OpenImageIO", "versions": [{"status": "affected", "version": "< 3.1.16.0"}]}]}], "published": "2026-09-18T16:17:08.733", "references": [{"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/6e9b86ee4cce8fd7bed6cfb101a266d8f8a296d4", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5296", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-3wxw-rqhw-j2w4", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/user-attachments/files/29615314/poc.zip", "tags": ["Exploit"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-122"}, {"lang": "en", "value": "CWE-131"}, {"lang": "en", "value": "CWE-787"}]}], "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 3.1.16.0, A crafted 1-bit contiguous cmyk tiff is exposed through a native uint1 imagespec, so callers allocate a bit-packed buffer. tiffinput::read_native_scanline_locked() nevertheless invokes tiffinput::bit_convert() with 8-bit output and writes one expanded byte per value into that smaller buffer, resulting in a heap out-of-bounds write and memory corruption. The affected implementation is identified by src/tiff.imageio/tiffinput.cpp, TIFFInput::bit_convert(), TIFFInput::read_native_scanline_locked(), PHOTOMETRIC_SEPARATED, 1-bit CMYK, and native uint1 ImageSpec, which define the relevant source path, functions, state, and trigger. This issue is fixed in 3.1.16.0."}], "lastModified": "2026-09-29T18:55:09.350", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:openimageio:openimageio:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "826C78E2-41E8-4051-9C61-F81D15230FAE", "versionEndExcluding": "3.1.16.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}