Pillow: Out-of-bounds access in _imagingmorph on a zero-width image

影響: pip:Pillow <= 12.3.0 → 13.0.0

A PPM or PGM file can declare a width of 0, which Pillow accepts, producing an image of size (0, N). Passing that image to ImageMorph.MorphOp.apply() makes the native morphology code index a row buffer at outrow[width - 1], which is outrow[-1] when the width is 0. The process crashes. Details The PPM parser reads width and height with no lower-bound check: - src/PIL/PpmImagePlugin.py:119 The native apply() writes the row edges with no guard that the width is positive: - src/_imagingmorp…

Read on GitHub Advisory Database

On 10/21/2026, 05:56 AM, GitHub Advisory Database published "Pillow: Out-of-bounds access in _imagingmorph on a zero-width image" (type: Advisory). Severity is "High" (high). Related technologies: Python. CVE: CVE-2026-112397.