CVE-2026-42217: OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for…
CVE-2026-42217 · Severity: critical · CVSS 9.8 · Published 2026-05-07
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, readVariableLengthInteger() decodes a variable-length integer from untrusted EXR input without bounding the shift count. After enough continuation bytes, the code executes a left shift by 70 on a 64-bit value, which is undefined behavior. This issue has been patched in versions 3.2.9, 3.3.11, and 3.4.11.
No. Junglewise Threat Intelligence has no report of CVE-2026-42217 being exploited in the wild.
How severe is CVE-2026-42217?
Critical severity, with a CVSS score of 9.8, published 7 May 2026.
Which products and versions are affected?
Openexr. The advisory does not name versions.
Is there a fix for CVE-2026-42217?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2026-42217?
Check whether you run Openexr. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.