CVE-2026-40250: OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for…
CVE-2026-40250 · Severity: high · CVSS 7.1 · Published 2026-04-21
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.4.0 through 3.4.9, 3.3.0 through 3.3.9, and 3.2.0 through 3.2.7, `internal_dwa_compressor.h:1040` performs `chan->width * chan->bytes_per_element` in `int32` arithmetic without a `(size_t)` cast. This is the same overflow pattern fixed in other decoders by CVE-2026-34589/34588/34544, but this line was missed. Versions 3.4.10, 3.3.10, and 3.2.8 contain a fix that addresses `internal_dwa_compressor.h:1040`.
No. Junglewise Threat Intelligence has no report of CVE-2026-40250 being exploited in the wild.
How severe is CVE-2026-40250?
High severity, with a CVSS score of 7.1, published 21 April 2026.
Which products and versions are affected?
Openexr. The advisory does not name versions.
Is there a fix for CVE-2026-40250?
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-2026-40250?
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.