Buffer overflow in Academysoftwarefoundation Openexr
CVE-2026-59187
OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. OpenEXR versions 3.3.0 through 3.3.12 and 3.4.0 through 3.4.13 are vulnerable to a heap out-of-bounds write when exrmetrics reads a crafted deep scanline EXR. This occurs with pixel conversion options such as --pixelmode float or --bench because DeepSlice requests FLOAT output while the backing sample buffers are allocated using the input HALF element size. The issue is fixed in versions 3.3.13 and 3.4.14.
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H.
Affected products
- Academysoftwarefoundation Openexr — versions >= 3.3.0, < 3.3.13, >= 3.4.0, < 3.4.14
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-59187?
- CVE-2026-59187 is a high-severity vulnerability in Academysoftwarefoundation Openexr, classified under Heap-based Buffer Overflow. CVSS score: 7.1/10. Published 2026-08-25.
- How severe is CVE-2026-59187?
- High severity. CVSS v3 base score is 7.1 out of 10.