PT-2026-29622 · Openexr · Openexr

Nicoppida · CVE-2026-34545 · Published 2026-04-01 · Updated 2026-07-17

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions OpenEXR versions 3.4.0 through 3.4.6

Description OpenEXR, a specification and reference implementation of the EXR file format used in the motion picture industry, contains a flaw. A crafted .exr file utilizing HTJ2K compression and a channel width of 32768 can cause a heap buffer overflow when decoded by applications. This overflow occurs due to a write primitive of 2 or 4 bytes per iteration, repeating for each pixel exceeding the overflow point. This can lead to remote code execution.

Recommendations Update to OpenEXR version 3.4.7 or later.

Exploit

Fix

Integer Overflow

Heap Based Buffer Overflow

Weakness Enumeration

CWE-190

CWE-1284

CWE-122

Related Identifiers

CVE-2026-34545

ECHO-DB67-6198-EA48

GHSA-GHFJ-FX47-WG97

JLSEC-2026-147

OPENSUSE-SU-2026:10505-1

Affected Products

Openexr

References · 30

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34545.json · Exploit
• https://github.com/AcademySoftwareFoundation/openexr/commit/3827998f5c041d6a94c6af24bbb363daa669e4b3 · Patch
• https://github.com/AcademySoftwareFoundation/openexr/security/advisories/GHSA-ghfj-fx47-wg97 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-34545 · Security Note
• https://osv.dev/vulnerability/JLSEC-2026-147 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-34545 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-34545 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-34545 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-34545 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-34545 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-13-CVE-2026-34545 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-11-CVE-2026-34545 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-DEBIAN-12-CVE-2026-34545 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10505-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-34545 · Security Note