AIKIDO-2026-213131
OpenEXR is vulnerable to Information Disclosure
43
Medium Risk
This Affects:
OpenEXRTL;DR
PyOpenEXR allocates a full data-window-shaped NumPy array for each channel but installs a framebuffer slice whose row stride is based on the subsampled row width. When reading a crafted scanline EXR that contains a horizontally subsampled channel, the native reader writes later source rows into the tail of earlier array rows and leaves the final array row uninitialized. The stale row is returned through the default OpenEXR.File API, exposing same-process heap contents. The fix corrects the framebuffer stride so each destination row is fully written.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you read untrusted EXR files with subsampled channels through the PyOpenEXR Python bindings.
Background info
OpenEXR is vulnerable to Information Disclosure in versions 3.3.0 - 3.3.12 and 3.4.0 - 3.4.13.
How to fix this
Upgrade the OpenEXR library to the patch version.
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SOC 2Compliant
ISO 27001Compliant