Is openexr affected by CVE-2026-26981?

PyPI openexr is affected in >=3.3.0 =3.4.0 <3.4.5.

Is CVE-2026-26981 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

medium

CVE-2026-26981

Q: Is CVE-2026-26981 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.5%.

PyPI · openexr

Summary

OpenEXR has heap-buffer-overflow via signed integer underflow in ImfContextInit.cpp

Severity: medium
EPSS: 0.5% (p40)
Also known as: GHSA-q6vj-wxvf-5m8c
Published: 2026-04-06

References

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-q6vj-wxvf-5m8c
https://nvd.nist.gov/vuln/detail/CVE-2026-26981
https://github.com/AcademySoftwareFoundation/openexr/commit/6bb2ddf1068573d073edf81270a015b38cc05cef

Related advisories

CVE-2026-34589 — high · PyPI/openexr
CVE-2026-34588 — high · PyPI/openexr
CVE-2026-34543 — high · PyPI/openexr
CVE-2026-34544 — high · PyPI/openexr
CVE-2026-27622 — high · PyPI/openexr
CVE-2025-48071 — high · PyPI/openexr
CVE-2025-64183 — medium · PyPI/openexr
CVE-2025-64182 — medium · PyPI/openexr

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.