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, a signed 32-bit integer overflow in the loop index expression i * 4 inside SwapRGBABytes() causes the function to compute a large negative pointer offset when processing kABGR DPX images with large dimensions. The immediate crash is an out-of-bounds read (the memcpy at line 45 reads from &input[i * 4] first), but the subsequent write operations at lines 46–49 target the same wrapped offset — making this a combined OOB read+write primitive. This vulnerability is fixed in 3.0.18.0 and 3.1.13.0.
CVSS Score
HIGH
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-2026-43909?
CVE-2026-43909 is a vulnerability with a CVSS score of 8.8 (HIGH). 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, a signed 32-bit integer overflow in th...
How severe is CVE-2026-43909?
CVE-2026-43909 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43909?
Check the references section above for vendor advisories and patch information. Affected products include: Openimageio Openimageio.