What is CVE-2026-39886?

CVE-2026-39886 is a medium-severity vulnerability in Academysoftwarefoundation Openexr, classified under Integer Overflow or Wraparound. CVSS score: 5.3/10. Published 2026-04-21.

How severe is CVE-2026-39886?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Integer overflow in Academysoftwarefoundation Openexr

CVE-2026-39886

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. Versions 3.4.0 through 3.4.9 have a signed integer overflow vulnerability in OpenEXR's HTJ2K (…

Vulnerability class: Integer Overflow

EPSS: 0.001 (23.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Academysoftwarefoundation Openexr — versions >= 3.4.0, < 3.4.10

Weakness classification (CWE)

CWE-190 — Integer Overflow or Wraparound

References

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-r3mr-mx8q-jcw5 (x_refsource_CONFIRM)
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.10 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-39886?: CVE-2026-39886 is a medium-severity vulnerability in Academysoftwarefoundation Openexr, classified under Integer Overflow or Wraparound. CVSS score: 5.3/10. Published 2026-04-21.
How severe is CVE-2026-39886?: Medium severity. CVSS v3 base score is 5.3 out of 10.