Buffer overflow in Academysoftwarefoundation Openexr
CVE-2026-34544
OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. From version 3.4.0 to before version 3.4.8, a crafted B44 or B44A EXR file can cause an out-of-bounds write in any application that decodes it via exr_decoding_run(). Consequences range from immediate crash (most likely) to corruption of adjacent heap allocations (layout-dependent). This issue has been patched in version 3.4.8.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (14.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 14.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Academysoftwarefoundation Openexr — versions >= 3.4.0, < 3.4.8
- Openexr
Weakness classification (CWE)
References
- github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-h762-rhv3… (Exploit, Vendor Advisory)
- github.com/AcademySoftwareFoundation/openexr/commit/35e7aa35e22c1975606be86e859… (Patch)
- github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.8 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-34544?
- CVE-2026-34544 is a high-severity vulnerability in Academysoftwarefoundation Openexr, classified under Integer Overflow or Wraparound. CVSS score: 7.3/10. Published 2026-04-01.
- How severe is CVE-2026-34544?
- High severity. CVSS v3 base score is 7.3 out of 10.