CVE-2026-43909
highpriority · track · 0EPSS 0.004 · 31 %ileEURUUSEPSS · scored 2026-10-27
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (10)
Products and version ranges known to be affected.
also known as (3)
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sources
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references (4)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2026-43909cnnvd
- https://openimageio.readthedocs.io/en/v3.1.12.0/Patchcnnvd
- https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-g267-j53j-5258enisa_euvd
- https://github.com/AcademySoftwareFoundation/OpenImageIO/security/advisories/GHSA-g267-j53j-5258ExploitVendor Advisorynvd
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