BIT-PILLOW-2026-96643 Pillow: PNG eXIf chunk makes EXIF parsing run in quadratic time

Pillow is a Python imaging library. From 11.0.0 until 13.0.0, Exif.load in src/PIL/Image.py repeatedly slices the remaining EXIF data while it begins with the six-byte Exif header. src/PIL/PngImagePlugin.py accepts an uncapped PNG eXIf chunk, so a file filled with repeated headers causes a new...