{"id":"CVE-2020-29509","aliases":["BIT-golang-2020-29509","GHSA-xhqq-x44f-9fgg","GO-2021-0060"],"url":"https://o3.security/vulnerability/CVE-2020-29509","summary":"Authentication Bypass in github.com/russellhaering/gosaml2","details":"The encoding/xml package in Go (all versions) does not correctly preserve the semantics of attribute namespace prefixes during tokenization round-trips, which allows an attacker to craft inputs that behave in conflicting ways during different stages of processing in affected downstream applications.","published":"2020-12-14T20:15:13.060Z","modified":"2026-07-08T23:35:24.887388Z","cvss":{"score":5.6,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/russellhaering/gosaml2","fixedVersion":"0.6.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/mattermost/xml-roundtrip-validator/blob/master/advisories/unstable-attributes.md"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210129-0006/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T23:35:24.887388Z"}}