{"id":"CVE-2026-67549","title":"OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation","summary":"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 cal…","severity":"high","cvss":7.6,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H","cwe":["CWE-122","CWE-131","CWE-787"],"vendor":"AcademySoftwareFoundation","product":"OpenImageIO","affected":["OpenImageIO < 3.1.16.0"],"published":"2026-09-18","updated":"2026-09-24","sourceUpdated":"2026-09-24T21:17:23.270","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-67549","references":[{"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/6e9b86ee4cce8fd7bed6cfb101a266d8f8a296d4","label":"security-advisories@github.com"},{"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5296","label":"security-advisories@github.com"},{"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0","label":"security-advisories@github.com"},{"url":"https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-3wxw-rqhw-j2w4","label":"security-advisories@github.com"},{"url":"https://github.com/user-attachments/files/29615314/poc.zip","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-24T20:57:34.673424Z"},"epss":0.00376,"epssPercentile":0.28706,"ingestedAt":"2026-09-18T16:45:41.390Z","slug":"CVE-2026-67549","body":"## Overview\n\nOpenImageIO 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":41.8,"likelihood":0.1,"exploitation":12,"ransomware":0},"changes":[{"seq":210404,"id":"CVE-2026-67549","ts":1790286832399,"field":"exploit_available","old":"false","new":"true"}]}