CVE-2026-55379

Description

Pillow is a Python imaging library. Prior to 12.3.0, PIL/BdfFontFile.py bdf_char() read the BBX width and height field from a BDF font file and passed attacker-controlled dimensions to Image.new() without calling Image._decompression_bomb_check(), bypassing Pillow's documented decompression bomb protection and allowing excessive memory allocation. This issue is fixed in version 12.3.0.

References

• https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst
• https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77d
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-45hq-cxwh-f6vc
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-45hq-cxwh-f6vc