AIKIDO-2026-70412
OpenEXR is vulnerable to Information Disclosure
33
Low Risk
This Affects:
OpenEXRTL;DR
OpenEXRCore's DWAA/DWAB decoder, embedded in the PyPI OpenEXR module, checks only that a declared UNKNOWN stream fits the scratch buffer, not that it covers every UNKNOWN-classified channel. A short UNKNOWN stream leaves part of the buffer uninitialized and those bytes are copied into reconstructed channel rows. The fix requires the declared UNKNOWN size to cover the bytes needed by UNKNOWN-classified channels.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you decode untrusted DWAA/DWAB-compressed EXR files through the OpenEXR Python bindings.
Background info
OpenEXR is vulnerable to Information Disclosure in versions 3.2.3 - 3.4.13.
How to fix this
Upgrade the OpenEXR library to the patch version.
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SOC 2Compliant
ISO 27001Compliant