CVE-2025-64182: PYSEC-2026-2851 - OpenEXR has buffer overflow in PyOpenEXR_old's channels() and channel()

CVE-2025-64182 · Severity: low · CVSS 3.1 · Published 2026-07-13

OpenEXR has buffer overflow in PyOpenEXR_old's channels() and channel()

Technologies: OpenEXR (PyPI). Vendors: PyPI.

Quick answers

Is CVE-2025-64182 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-64182 being exploited in the wild.
How severe is CVE-2025-64182?
Low severity, with a CVSS score of 3.1, published 13 July 2026.
Which products and versions are affected?
OpenEXR (PyPI) ECOSYSTEM:introduced=3.2.0,fixed=3.2.5, ECOSYSTEM:introduced=3.2.0,fixed=3.2.5,introduced=3.3.0,fixed=3.3.6,introduced=3.4.0,fixed=3.4.3.
Is there a fix for CVE-2025-64182?
Yes. OpenEXR (PyPI): upgrade to 3.2.5, 3.4.3 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2025-64182?
Check whether you run OpenEXR (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • OpenEXR (PyPI): upgrade to 3.2.5, 3.4.3 or later
    pip install "OpenEXR>=3.4.3"

Affected products

  • OpenEXR (PyPI) ECOSYSTEM:introduced=3.2.0,fixed=3.2.5, ECOSYSTEM:introduced=3.2.0,fixed=3.2.5,introduced=3.3.0,fixed=3.3.6,introduced=3.4.0,fixed=3.4.3

Identifiers

  • CVE-2025-64182
  • GHSA-vh63-9mqx-wmjr
  • PYSEC-2026-2851

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