Vulnerability Description
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, the DWA lossy decoder constructs temporary per-component block pointers using signed 32-bit arithmetic. For a large enough width, the calculation overflows and later decoder stores operate on a wrapped pointer outside the allocated rowBlock backing store. This vulnerability is fixed in 3.2.7, 3.3.9, and 3.4.9.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openexr | Openexr | >= 3.2.0, < 3.2.7 |
Related Weaknesses (CWE)
References
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.7ProductRelease Notes
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.9ProductRelease Notes
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.9ProductRelease Notes
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-p8ExploitVendor Advisory
FAQ
What is CVE-2026-34589?
CVE-2026-34589 is a vulnerability with a CVSS score of 5.0 (MEDIUM). OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From 3.2.0 to before 3.2.7, 3.3.9, and 3.4.9, the DWA l...
How severe is CVE-2026-34589?
CVE-2026-34589 has been rated MEDIUM with a CVSS base score of 5.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-34589?
Check the references section above for vendor advisories and patch information. Affected products include: Openexr Openexr.