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Vulnerability · Published Aug 25, 2026 · Assigned by GitHub_M

CVE-2026-59983OpenEXR: Out-of-bounds read in DeepTiledInputFile sample-count table decode 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 before 3.2.11, 3.3.0 through 3.3.12, and 3.4.0 through 3.4.13 are vulnerable on ILP32 builds to an out-of-bounds read. The vulnerability is reached when a crafted uncompressed deep-tile EXR causes the sample-count table size calculation in OpenEXRCore decoding.c to wrap before unpack_sample_table() iterates over the full attacker-controlled tile dimensions, 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-2026-59983
Debian:12openexrno fix listedDEBIAN-CVE-2026-59983
Debian:13openexrno fix listedDEBIAN-CVE-2026-59983
Debian:14openexr3.4.14-0.1DEBIAN-CVE-2026-59983
Ubuntu:26.10openexrno fix listedUBUNTU-CVE-2026-59983

Affected products (as reported)

VendorProductVersions
AcademySoftwareFoundation openexr < 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