# CVE-2026-40250

> Vulnerability · severity: **HIGH** (CVSS 7.1).

## Description

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`.

## Key facts

- **CVE ID:** CVE-2026-40250
- **Published:** 2026-04-21
- **CVSS severity:** HIGH
- **CVSS base score:** 7.1
- **CWE codes:** CWE-190

## Affected products

- `openexr:openexr`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40250

## Citation

> AI Analytics. CVE-2026-40250. Retrieved 2026-07-22 from https://api.ai-analytics.org/cve/CVE-2026-40250. Derived from NIST NVD. Licensed CC0.

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