{"id":"CVE-2020-27846","aliases":["BIT-grafana-2020-27846","GHSA-4hq8-gmxx-h6w9","GO-2021-0058"],"url":"https://o3.security/vulnerability/CVE-2020-27846","summary":"XML Processing error in github.com/crewjam/saml","details":"A signature verification vulnerability exists in crewjam/saml. This flaw allows an attacker to bypass SAML Authentication. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.","published":"2020-12-21T16:15:13.067Z","modified":"2026-07-08T06:00:50.660212953Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.04872,"percentile":0.91406,"asOf":"2026-08-23"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Go","name":"github.com/crewjam/saml","fixedVersion":"0.4.3"}],"fix":null,"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOANVQBFQZYI/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77ZMRIC77FEM/"},{"type":"ADVISORY","url":"https://github.com/crewjam/saml/security/advisories/GHSA-4hq8-gmxx-h6w9"},{"type":"ADVISORY","url":"https://grafana.com/blog/2020/12/17/grafana-6.7.5-7.2.3-and-7.3.6-released-with-important-security-fix-for-grafana-enterprise/"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210205-0002/"},{"type":"FIX","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1907670"},{"type":"EVIDENCE","url":"https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T06:00:50.660212953Z"}}