Vulnerability Details CVE-2026-40250
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`.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 10.0%
CVSS Severity
CVSS v3 Score 7.1
References
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.8
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.10
- https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.10
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-m5qw-23x2-6phj
Products affected by CVE-2026-40250
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cpe:2.3:a:openexr:openexr:3.2.0
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cpe:2.3:a:openexr:openexr:3.2.1
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cpe:2.3:a:openexr:openexr:3.2.2
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cpe:2.3:a:openexr:openexr:3.2.3
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cpe:2.3:a:openexr:openexr:3.2.4
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cpe:2.3:a:openexr:openexr:3.2.5
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cpe:2.3:a:openexr:openexr:3.2.6
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cpe:2.3:a:openexr:openexr:3.2.7
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cpe:2.3:a:openexr:openexr:3.3.0
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cpe:2.3:a:openexr:openexr:3.3.1
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cpe:2.3:a:openexr:openexr:3.3.2
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cpe:2.3:a:openexr:openexr:3.3.3
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cpe:2.3:a:openexr:openexr:3.3.4
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cpe:2.3:a:openexr:openexr:3.3.5
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cpe:2.3:a:openexr:openexr:3.3.6
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cpe:2.3:a:openexr:openexr:3.3.7
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cpe:2.3:a:openexr:openexr:3.3.8
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cpe:2.3:a:openexr:openexr:3.3.9
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cpe:2.3:a:openexr:openexr:3.4.0
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cpe:2.3:a:openexr:openexr:3.4.1
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cpe:2.3:a:openexr:openexr:3.4.2
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cpe:2.3:a:openexr:openexr:3.4.3
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cpe:2.3:a:openexr:openexr:3.4.4
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cpe:2.3:a:openexr:openexr:3.4.5
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cpe:2.3:a:openexr:openexr:3.4.6
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cpe:2.3:a:openexr:openexr:3.4.7
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cpe:2.3:a:openexr:openexr:3.4.8
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cpe:2.3:a:openexr:openexr:3.4.9