PYSEC-2026-2255

vendorUSosv

view advisory published 2026-07-06Licence: CC-BY-4.0

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-55379US	—	0.42% (35th)	—	2026-07-06
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 dimension…

references

External citations — patches, advisories, analysis.

https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rstADVISORY
https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77dFIX
https://github.com/python-pillow/Pillow/security/advisories/GHSA-45hq-cxwh-f6vcEVIDENCE

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