PyPI/openexr CVE-2026-34544: unknown, EPSS 0.24%

OpenEXR: integer overflow to OOB write in uncompress_b44_impl()

Action: Upgrade openexr to 3.4.8 or later.

pip install openexr==3.4.8

Affected

Fixed versions

Sources

• osv: PYSEC-2026-2847
• https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-h762-rhv3-h25v
• https://nvd.nist.gov/vuln/detail/CVE-2026-34544
• https://github.com/AcademySoftwareFoundation/openexr/commit/35e7aa35e22c1975606be86e859f31cc1fc598ee
• https://github.com/AcademySoftwareFoundation/openexr
• https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.8
• https://pypi.org/project/openexr
• https://github.com/advisories/GHSA-h762-rhv3-h25v

CVE-2026-34544 · published 2026-07-13T14:36:47.469813Z · modified 2026-07-13T16:32:33.035538353Z · JSON