Vulnerability Description
OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, the bounds check in TGAInput::decode_pixel computes k + palbytespp as unsigned 32-bit arithmetic. When k = 0xFFFFFFFC and palbytespp = 4, the addition wraps to 0, which compares less than palette_alloc_size and passes the check. The subsequent palette access uses the unwrapped k (0xFFFFFFFC) as the index, reading ~4 GB past the start of the palette buffer — SEGV. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openimageio | Openimageio | < 3.0.18.0 |
Related Weaknesses (CWE)
References
- https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSExploitVendor Advisory
- https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSExploitVendor Advisory
FAQ
What is CVE-2026-43996?
CVE-2026-43996 is a vulnerability with a CVSS score of 5.5 (MEDIUM). OpenImageIO is a toolset for reading, writing, and manipulating image files of any image file format relevant to VFX / animation. Prior to 3.0.18.0 and 3.1.13.0, the bounds check in TGAInput::decode_p...
How severe is CVE-2026-43996?
CVE-2026-43996 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43996?
Check the references section above for vendor advisories and patch information. Affected products include: Openimageio Openimageio.