{"id":"BIT-pillow-2026-55379","summary":"Pillow BdfFontFile`: `Image.new()` called without `_decompression_bomb_check()` — bomb protection bypass via font loading","details":"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.","aliases":["CVE-2026-55379","GHSA-45hq-cxwh-f6vc","PYSEC-2026-2255"],"modified":"2026-07-13T07:26:26.726353373Z","published":"2026-07-08T11:34:11.466Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*"]},"references":[{"type":"WEB","url":"https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst"},{"type":"WEB","url":"https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77d"},{"type":"WEB","url":"https://github.com/python-pillow/Pillow/security/advisories/GHSA-45hq-cxwh-f6vc"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55379"}],"affected":[{"package":{"name":"pillow","ecosystem":"Bitnami","purl":"pkg:bitnami/pillow"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"12.3.0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/pillow/BIT-pillow-2026-55379.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}],"schema_version":"1.7.5"}