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Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From versions 3.0.0 to before 3.2.9, 3.3.0 to before 3.3.11, and 3.4.0 to before 3.4.11, IDManifest::init() reconstructs strings from a prefix-compressed representation. If the previous string is longer than 255 bytes, the next string is expected to begin with a 2-byte prefix length. The code reads stringList[i][0] and stringList[i][1] without checking that the current string has at least two bytes. This issue has been patched in versions 3.2.9, 3.3.11, and 3.4.11.

PUBLISHED Reserved 2026-04-25 | Published 2026-05-07 | Updated 2026-05-07 | Assigner GitHub_M




HIGH: 8.8CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-125: Out-of-bounds Read

Product status

>= 3.0.0, < 3.2.9
affected

>= 3.3.0, < 3.3.11
affected

>= 3.4.0, < 3.4.11
affected

References

github.com/...penexr/security/advisories/GHSA-65j8-95g9-jgj4 exploit

github.com/...penexr/security/advisories/GHSA-65j8-95g9-jgj4

cve.org (CVE-2026-42216)

nvd.nist.gov (CVE-2026-42216)

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