{"schema_version":"1.9.0","id":"CVE-2026-3644","published":"2026-03-16T17:37:31.344Z","modified":"2026-08-15T04:25:19.192464175Z","aliases":["PSF-2026-11"],"related":["ALSA-2026:10950","ALSA-2026:19019","ALSA-2026:19064","ALSA-2026:19176","ALSA-2026:19177","CGA-x3jx-7xjp-vpm8","SUSE-SU-2026:1206-1","SUSE-SU-2026:1292-1","SUSE-SU-2026:1296-1","SUSE-SU-2026:1345-1","SUSE-SU-2026:1349-1","SUSE-SU-2026:1354-1","SUSE-SU-2026:1376-1","SUSE-SU-2026:1385-1","SUSE-SU-2026:1417-1","SUSE-SU-2026:1530-1","SUSE-SU-2026:1715-1","SUSE-SU-2026:21104-1","SUSE-SU-2026:21178-1","SUSE-SU-2026:21254-1","openSUSE-SU-2026:10469-1","openSUSE-SU-2026:10477-1","openSUSE-SU-2026:10478-1","openSUSE-SU-2026:10479-1","openSUSE-SU-2026:10480-1","openSUSE-SU-2026:10481-1","openSUSE-SU-2026:20517-1"],"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().","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/python/cpython","events":[{"introduced":"0"},{"fixed":"01104ce1beb3135c2e0c01ec835b994c1f55a1c0"},{"introduced":"ebf955df7a89ed0c7968f79faec1de49f61ed7cb"},{"fixed":"23116f998f6789d8c2fbe5ed5b8146854c8c2a4f"},{"fixed":"3974092b037f9a3b000fb15b48ea61ce3b25d330"},{"fixed":"556aa098e738b127c714866f819b4abe2f7593d8"},{"fixed":"57e88c1cf95e1481b94ae57abe1010469d47a6b4"},{"fixed":"62ceb396fcbe69da1ded3702de586f4072b590dd"},{"fixed":"d16ecc6c3626f0e2cc8f08c309c83934e8a979dd"},{"fixed":"dae4b1a21f8df4570e30986affd61bbe4ade4cef"}],"database_specific":{"cpe":"cpe:2.3:a:python:python:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"3.13.13"},{"introduced":"3.14.0"},{"fixed":"3.14.4"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v3.15.0a7","v3.12.13","v3.10.20","v3.11.15","v3.15.0a6","v3.13.12","v3.14.3","v3.15.0a5","v3.15.0a4","v3.15.0a3","v3.14.2","v3.13.11","v3.13.10","v3.14.1","v3.15.0a2","v3.15.0a1","v3.13.8","v3.11.14","v3.10.19","v3.12.12","v3.14.0","v3.13.7","v3.13.6","v3.13.5","v3.13.4","v3.11.13","v3.10.18","v3.12.11","v3.14.0b1","v3.13.3","v3.11.12","v3.12.10","v3.14.0a7","v3.10.17","v3.14.0a6","v3.14.0a5","v3.13.2","v3.12.9","v3.14.0a4","v3.14.0a3","v3.13.1","v3.12.8","v3.10.16","v3.11.11","v3.14.0a2","v3.14.0a1","v3.13.0","v3.13.0rc3","v3.12.7","v3.11.10","v3.10.15","v3.13.0rc2","v3.12.6","v3.12.5","v3.13.0rc1","v3.13.0b4","v3.13.0b3","v3.12.4","v3.13.0b2","v3.13.0b1","v3.13.0a6","v3.12.3","v3.11.9","v3.10.14","v3.13.0a5","v3.13.0a4","v3.12.2","v3.11.8","v3.13.0a3","v3.12.1","v3.11.7","v3.13.0a2","v3.13.0a1","v3.11.6","v3.12.0","v3.12.0rc3","v3.12.0rc2","v3.11.5","v3.10.13","v3.12.0rc1","v3.12.0b4","v3.12.0b3","v3.11.4","v3.10.12","v3.12.0b2","v3.12.0b1","v3.10.11","v3.11.3","v3.12.0a7","v3.12.0a6","v3.10.10","v3.11.2","v3.12.0a5","v3.12.0a4","v3.12.0a3","v3.10.9","v3.11.1","v3.12.0a2","v3.12.0a1","v3.11.0rc2","v3.10.8","v3.10.7","v3.11.0rc1","v3.10.6","v3.11.0b5","v3.11.0b4","v3.10.5","v3.11.0b3","v3.11.0b2","v3.11.0b1","v3.11.0a7","v3.10.4","v3.10.3","v3.11.0a6","v3.11.0a5","v3.11.0a4","v3.10.2","v3.11.0a3","v3.10.1","v3.10.0rc2","v3.10.0rc1","v3.10.0b4","v3.10.0b3","v3.10.0b2","v3.10.0b1","v3.10.0a7","v3.10.0a1","v3.9.0a2","v3.7.0a2","v3.6.0b1","v3.6.0a3","v3.5.0b1","v3.5.0a4","v3.5.0a3","v3.5.0a2","v3.5.0a1","v3.4.0b3","v3.4.0b2","v3.4.0b1","v3.4.0a4","v3.4.0a3","v3.4.0a2","v3.4.0a1","v3.3.0rc3","v3.3.0rc2","v3.3.0rc1","v3.3.0b2","v3.3.0b1","v3.3.0a4","v3.3.0a3","v3.3.0a2","v3.2rc3","v3.2rc2","v3.2rc1","v3.2b2","v3.2b1","v3.2a4","v3.2a3","v3.2a2","v3.2a1","v3.1","v3.1rc2","v3.1rc1","v3.1b1","v3.1a2","v3.1a1","v3.0rc3","v3.0rc2","v3.0rc1","v3.0b3","v3.0b2","v3.0b1","v3.0a5","v3.0a4","v3.0a3","v3.0a2","v3.0a1","v2.4","v2.4c1","v2.4b2","v2.4b1","v2.4a3","v2.4a2","v2.4a1","v2.3c2","v2.3c1","v2.2a3","v2.1","v2.1c2","v2.1c1","v2.1b2","v2.1b1","v2.1a2","v2.1a1","v2.0","v2.0c1","v2.0b2","v2.0b1","v1.6a2","v1.6a1","v1.5.2","v1.5.2c1","v1.5.2b2","v1.5.2b1","v1.5.2a2","v1.5.2a1","v1.5.1","v1.5","v1.5b2","v1.5b1","v1.5a4","v1.5a3","v1.5a2","v1.5a1","v1.4","v1.4b3","v1.4b2","v1.4b1","v1.3","v1.3b1","v1.2","v1.2b4","v1.2b3","v1.2b2","v1.2b1","v1.1.1","v1.1","v1.0.2","v1.0.1","v0.9.9","v0.9.8"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-3644.json"}}],"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-2026-3644.json"},{"type":"ADVISORY","url":"https://mail.python.org/archives/list/security-announce@python.org/thread/H6CADMBCDRFGWCMOXWUIHFJNV43GABJ7/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3644"},{"type":"REPORT","url":"https://github.com/python/cpython/issues/145599"},{"type":"FIX","url":"https://github.com/python/cpython/commit/3974092b037f9a3b000fb15b48ea61ce3b25d330"},{"type":"FIX","url":"https://github.com/python/cpython/commit/556aa098e738b127c714866f819b4abe2f7593d8"},{"type":"FIX","url":"https://github.com/python/cpython/commit/57e88c1cf95e1481b94ae57abe1010469d47a6b4"},{"type":"FIX","url":"https://github.com/python/cpython/commit/62ceb396fcbe69da1ded3702de586f4072b590dd"},{"type":"FIX","url":"https://github.com/python/cpython/commit/d16ecc6c3626f0e2cc8f08c309c83934e8a979dd"},{"type":"FIX","url":"https://github.com/python/cpython/commit/dae4b1a21f8df4570e30986affd61bbe4ade4cef"},{"type":"FIX","url":"https://github.com/python/cpython/pull/145600"},{"type":"PACKAGE","url":"https://github.com/python/cpython"}],"database_specific":{"cna_assigner":"PSF","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/3xxx/CVE-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"}]}