PyPI/openexr CVE-2026-34543: high 7.5, EPSS 0.50%

OpenEXR: Heap information disclosure in PXR24 decompression via unchecked decompressed size (undo_pxr24_impl)

Action: Upgrade openexr to 3.4.8 or later.

pip install openexr==3.4.8

Affected

Fixed versions

Sources

• osv: PYSEC-2026-2850
• nvd: CVE-2026-34543
• https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vc68-257w-m432
• https://github.com/AcademySoftwareFoundation/openexr/commit/5f6d0aaa9e43802917af7db90f181e88e083d3b8
• 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-vc68-257w-m432

CVE-2026-34543 · published 2026-07-13T14:36:47.568011Z · modified 2026-07-13T16:32:33.854561150Z · JSON