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CVE-2026-26981

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CVE-2026-26981

Published: Feb 24, 2026

Modified: Feb 24, 2026

PUBLISHED

CVSS v3.1

6.5

MEDIUM

Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.3.0 through 3.3.6 and 3.4.0 through 3.4.4, a heap-buffer-overflow (OOB read) occurs in the `istream_nonparallel_read` function in `ImfContextInit.cpp` when parsing a malformed EXR file through a memory-mapped `IStream`. A signed integer subtraction produces a negative value that is implicitly converted to `size_t`, resulting in a massive length being passed to `memcpy`. Versions 3.3.7 and 3.4.5 contain a patch.

VendorProductVersions

AcademySoftwareFoundation

openexr

affected
>= 3.3.0, < 3.3.7
affected
>= 3.4.0, < 3.4.5

Weaknesses (CWE)

CWE-195

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

References

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