CVE-2026-34544 | THREATINT

Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From version 3.4.0 to before version 3.4.8, a crafted B44 or B44A EXR file can cause an out-of-bounds write in any application that decodes it via exr_decoding_run(). Consequences range from immediate crash (most likely) to corruption of adjacent heap allocations (layout-dependent). This issue has been patched in version 3.4.8.

PUBLISHED Reserved 2026-03-30 | Published 2026-04-01 | Updated 2026-04-02 | Assigner GitHub_M

HIGH: 8.4CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-190: Integer Overflow or Wraparound

CWE-787: Out-of-bounds Write

Product status

>= 3.4.0, < 3.4.8

affected

References

github.com/...penexr/security/advisories/GHSA-h762-rhv3-h25v

github.com/...ommit/35e7aa35e22c1975606be86e859f31cc1fc598ee

github.com/...SoftwareFoundation/openexr/releases/tag/v3.4.8

cve.org (CVE-2026-34544)

nvd.nist.gov (CVE-2026-34544)

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