{"id":"BIT-libpython-2026-3644","summary":"Incomplete control character validation in http.cookies","details":"The fix for CVE-2026-0672, which rejected control characters in http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator, and unpickling paths were not patched, allowing control characters to bypass input validation. Additionally, BaseCookie.js_output() lacked the output validation applied to BaseCookie.output().","modified":"2026-03-27T08:56:26.347986672Z","published":"2026-03-18T08:45:39.878Z","withdrawn":"2026-03-27T08:47:44.778221Z","database_specific":{"cpes":["cpe:2.3:a:python:python:*:*:*:*:*:*:*:*"],"severity":"Medium"},"references":[{"type":"WEB","url":"https://github.com/python/cpython/commit/57e88c1cf95e1481b94ae57abe1010469d47a6b4"},{"type":"WEB","url":"https://github.com/python/cpython/commit/62ceb396fcbe69da1ded3702de586f4072b590dd"},{"type":"WEB","url":"https://github.com/python/cpython/commit/d16ecc6c3626f0e2cc8f08c309c83934e8a979dd"},{"type":"WEB","url":"https://github.com/python/cpython/issues/145599"},{"type":"WEB","url":"https://github.com/python/cpython/pull/145600"},{"type":"WEB","url":"https://mail.python.org/archives/list/security-announce@python.org/thread/H6CADMBCDRFGWCMOXWUIHFJNV43GABJ7/"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3644"}],"affected":[{"package":{"name":"libpython","ecosystem":"Bitnami","purl":"pkg:bitnami/libpython"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.15.0"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/libpython/BIT-libpython-2026-3644.json"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.7.5"}