Pillow BdfFontFile`: `Image.new()` called without `_decompression_bomb_check()` — bomb protection bypass via font loading
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.
01
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-55379US | — | — | ||
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… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rstARTICLE
- https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77dFIX
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-45hq-cxwh-f6vcADVISORY
- https://nvd.nist.gov/vuln/detail/CVE-2026-55379WEB
scry
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