Vulnerability Description
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. Versions 3.3.0 through 3.3.12 and 3.4.0 through 3.4.13 contain a heap buffer overflow in PyOpenEXR triggered by a channel-name key collision between literal and prefixed RGB channels. When separate_channels=false, PyOpenEXR maps each physical channel name through channelNameToRGBA() and coalesces the results into a shared RGB array. A crafted flat scanline EXR that contains both a literal channel such as left and prefixed channels such as left.R, left.G, and left.B causes these names to collide, so the wrapper reuses an undersized two-dimensional NumPy array for the coalesced RGB slices and writes out of bounds when OpenEXR.File(path) decodes the pixels. This issue is fixed in versions 3.3.13 and 3.4.14.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/AcademySoftwareFoundation/openexr/commit/c1f3ec0d91cfa5a8035e
- https://github.com/AcademySoftwareFoundation/openexr/commit/d134e3cd81a2e343f291
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-rw
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-rw
FAQ
What is CVE-2026-68513?
CVE-2026-68513 is a vulnerability with a CVSS score of 7.1 (HIGH). OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. Versions 3.3.0 through 3.3.12 and 3.4.0 through 3.4.13 contain a heap bu...
How severe is CVE-2026-68513?
CVE-2026-68513 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-68513?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.