Python Library OpenEXR 3.4.x < 3.4.7 Heap Buffer Overflow (OOB Read)

high Nessus Plugin ID 304814

Synopsis

A Python library installed on the remote host is affected by a heap buffer overflow vulnerability.

Description

The version of the OpenEXR Python package installed on the remote host is 3.4.x prior to 3.4.7.
It is, therefore, affected by a heap buffer overflow vulnerability:

- A heap-buffer-overflow (out-of-bounds read) occurs in the the HTJ2K decoder in OpenEXR when copying decompressed samples from OpenJPH buffers into the EXR output buffer. (CVE-2026-34545)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to OpenEXR version 3.4.7 or later.

Plugin Details

Severity: High

ID: 304814

File Name: python_openexr_CVE-2026-34545.nasl

Version: 1.1

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 4/3/2026

Updated: 4/3/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-34545

CVSS v3

Risk Factor: High

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: cpe:/a:academysoftwarefoundation:openexr

Patch Publication Date: 3/28/2026

Vulnerability Publication Date: 3/28/2026

Reference Information

CVE: CVE-2026-34545

IAVA: 2026-A-0295

Detections

Analytics