High 8.4Published Apr 1, 2026

CVE-2026-34544OpenEXR: integer overflow to OOB write in uncompress_b44_impl()

Updated under an hour ago (Oct 26, 2026, 1:10 PM ET)

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It affects AcademySoftwareFoundation openexr and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for AcademySoftwareFoundation openexr

Exploited in the last 30 days

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.

CVSS: 8.4 HIGH (v4.0, CNA)CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-190, CWE-787
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 2, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

AcademySoftwareFoundation openexr academysoftwarefoundation:openexr (from the name)	from 3.4.0, < 3.4.8	CNA record
openexr openexr openexr:openexr	from 3.2.0 before 3.2.7; from 3.3.0 before 3.3.9; from 3.4.0 before 3.4.8	NVD

References

References

https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-h762-rhv3-h25v	x-refsource-confirm, exploit, vendor-advisory
https://github.com/AcademySoftwareFoundation/openexr/commit/35e7aa35e22c1975606be86e859f31cc1fc598ee	x-refsource-misc, patch
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.8	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.