Vulnerability · Published Aug 25, 2026 · Assigned by GitHub_M
CVE-2026-59187OpenEXR: exrmetrics deep pixelmode heap buffer overflow
High 7.1
In plain English
A high-severity heap buffer overflow in openexr from AcademySoftwareFoundation. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | openexr | 3.4.15-r0 | ALPINE-CVE-2026-59187 |
| Debian:12 | openexr | no fix listed | DEBIAN-CVE-2026-59187 |
| Debian:13 | openexr | no fix listed | DEBIAN-CVE-2026-59187 |
| Debian:14 | openexr | 3.4.14-0.1 | DEBIAN-CVE-2026-59187 |
| Ubuntu:26.10 | openexr | no fix listed | UBUNTU-CVE-2026-59187 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| AcademySoftwareFoundation | openexr | >= 3.3.0, < 3.3.13>= 3.4.0, < 3.4.14 |
Weakness: CWE-122, CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
References
- https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-6jj8-cxcr-j8hm x_refsource_CONFIRM
- https://github.com/AcademySoftwareFoundation/openexr/commit/46e70220dc91dbc1341fac4671704e970b450585 x_refsource_MISC
- https://github.com/AcademySoftwareFoundation/openexr/commit/7e772dd704b9b5d6dc2564647d89f7813f608e94 x_refsource_MISC