CVE-2026-96639

The Pillow Python imaging library (versions 11.0.0 through 13.0.0 ) is vulnerable to out-of-bounds memory operations in multi-frame loaders. The root cause is that ImageFile.load_prepare() reuses stale native storage from a narrow frame mode without verifying if the subsequent frame's mode and si...

CVE-2026-96639 Pillow multi-frame loaders can reuse stale native image storage after mode transitions

Pillow is a Python imaging library. From 11.0.0 until 13.0.0, multi-frame loaders can retain an ImagingCore allocation created for a narrow frame mode while a later frame of the same dimensions changes the logical mode and decoder tiles to wider RGB or CMYK data. ImageFile.loadprepare reuses the...