{"action":"Upgrade python-pysaml2 to 6.5.1-1 or later.","affected":[{"fixed":"6.5.1-1","introduced":"0"}],"component":"python-pysaml2","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:14","exploited":false,"fixed_versions":["6.5.1-1"],"id":"tcs_01M5NFD7PMSSN5HGWA3Y8WD7F4","modified_at":"2026-10-23T18:03:11.750032706Z","published_at":"2021-01-21T15:15:14.423Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-21239","https://security-tracker.debian.org/tracker/CVE-2021-21239"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-21239#Debian:14/python-pysaml2","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-21239"}],"summary":"PySAML2 is a pure python implementation of SAML Version 2 Standard. PySAML2 before 6.5.0 has an improper verification of cryptographic signature vulnerability. Users of pysaml2 that use the default Cr"}