{"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":"### Impact\n\nThere are three vulnerabilities in the go `encoding/xml` package that can allow an attacker to forge part of a signed XML document. For details on this vulnerability see [xml-roundtrip-validator](https://github.com/mattermost/xml-roundtrip-validator)\n\n### Patches\n\nIn version 0.4.3, all XML input is validated prior to being parsed.","published":"2020-12-21T16:15:13.067Z","modified":"2026-10-22T02:47:35.288511892Z","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":0.9153,"asOf":"2026-09-11"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Go","name":"github.com/crewjam/saml","fixedVersion":"0.4.3"}],"fix":{"url":"https://github.com/crewjam/saml/commit/da4f1a0612c0a8dd0452cf8b3c7a6518f6b4d053","label":"crewjam/saml@da4f1a0"},"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/"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27846"},{"type":"WEB","url":"https://github.com/crewjam/saml/commit/da4f1a0612c0a8dd0452cf8b3c7a6518f6b4d053"},{"type":"PACKAGE","url":"https://github.com/crewjam/saml"},{"type":"WEB","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":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3YUTKIRWT6TWU7DS6GF3EOANVQBFQZYI"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ICP3YRY2VUCNCF2VFUSK77ZMRIC77FEM"},{"type":"WEB","url":"https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities"},{"type":"WEB","url":"https://pkg.go.dev/vuln/GO-2021-0058"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20210205-0002"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-22T02:47:35.288511892Z"}}