Vulnerability in Academysoftwarefoundation Openexr
CVE-2026-34543
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, sensitive information from heap memory may be leaked through the decoded pixel data (information disclosure). This occurs under default settings; simply reading a malicious EXR file is sufficient to trigger the issue, without any user interaction. This issue has been patched in version 3.4.8.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (43.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000
Affected products
- Academysoftwarefoundation Openexr — versions >= 3.4.0, < 3.4.8
- Openexr
Weakness classification (CWE)
References
- github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-vc68-257w… (Exploit, Vendor Advisory)
- github.com/AcademySoftwareFoundation/openexr/commit/5f6d0aaa9e43802917af7db90f1… (Patch)
- github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.8 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-34543?
- CVE-2026-34543 is a high-severity vulnerability in Academysoftwarefoundation Openexr, classified under Use of Uninitialized Resource. CVSS score: 7.5/10. Published 2026-04-01.
- How severe is CVE-2026-34543?
- High severity. CVSS v3 base score is 7.5 out of 10.