CVE-2026-67549OpenImageIO: TIFF 1-bit CMYK bit conversion heap out-of-bounds write
Updated under an hour ago ()
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It affects AcademySoftwareFoundation OpenImageIO and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.6 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
- Weakness (CWE)
- CWE-122, CWE-131, CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Sep 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
AcademySoftwareFoundation OpenImageIO academysoftwarefoundation:openimageio (from the name) | before 3.1.16.0 | CNA record |
openimageio openimageio openimageio:openimageio | before 3.1.16.0 | NVD |
References
- https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-3wxw-rqhw-j2w4x-refsource-confirm, exploit, vendor-advisory
- https://github.com/AcademySoftwareFoundation/OpenImageIO/pull/5296x-refsource-misc, issue-tracking, patch
- https://github.com/AcademySoftwareFoundation/OpenImageIO/commit/6e9b86ee4cce8fd7bed6cfb101a266d8f8a296d4x-refsource-misc, patch
- https://github.com/AcademySoftwareFoundation/OpenImageIO/releases/tag/v3.1.16.0x-refsource-misc, release-notes
- https://github.com/user-attachments/files/29615314/poc.zipexploit
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.