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Vulnerability · Published Aug 25, 2026 · Assigned by GitHub_M

CVE-2026-59985OpenEXR: Heap out-of-bounds read in OpenEXRCore RLE decoding on ILP32

Medium 5.5

In plain English

A medium-severity out-of-bounds read in openexr from AcademySoftwareFoundation. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 93.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

OpenEXR is the reference implementation and specification for the EXR image format, widely used in the motion picture industry. OpenEXR versions 3.2.0 through 3.2.10, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13 are vulnerable on ILP32 builds to a heap out-of-bounds read. The issue occurs when a crafted RLE-compressed EXR causes the 64-bit unpacked size to truncate before allocation in OpenEXRCore decoding.c and unpack_32bit() reads beyond the resulting buffer, allowing denial of service. This issue is fixed in versions 3.2.11, 3.3.13, and 3.4.14.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Alpine:v3.24openexr3.4.15-r0ALPINE-CVE-2026-59985
Debian:12openexrno fix listedDEBIAN-CVE-2026-59985
Debian:13openexrno fix listedDEBIAN-CVE-2026-59985
Debian:14openexr3.4.14-0.1DEBIAN-CVE-2026-59985
Ubuntu:26.10openexrno fix listedUBUNTU-CVE-2026-59985

Affected products (as reported)

VendorProductVersions
AcademySoftwareFoundation openexr >= 3.2.0, < 3.2.11>= 3.3.0, < 3.3.13>= 3.4.0, < 3.4.14

Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References