{"id":"CVE-2021-23365","aliases":["GHSA-599h-8wpj-75xj","GO-2022-0906","SNYK-GOLANG-GITHUBCOMTYKTECHNOLOGIESTYKIDENTITYBROKER-1089720"],"title":"Authentication Bypass in tyk-identity-broker","summary":"Authentication Bypass in tyk-identity-broker","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","vendor":"tyktechnologies","product":"github.com/tyktechnologies/tyk-identity-broker","ecosystem":"go","affected":["github.com/tyktechnologies/tyk-identity-broker < 1.1.1"],"patched":["github.com/tyktechnologies/tyk-identity-broker 1.1.1"],"published":"2021-06-23","updated":"2026-07-08","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-599h-8wpj-75xj","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23365"},{"url":"https://github.com/TykTechnologies/tyk-identity-broker/pull/147"},{"url":"https://github.com/TykTechnologies/tyk-identity-broker/commit/243092965b0f93a95a14cb882b5b9a3df61dd5c0"},{"url":"https://github.com/TykTechnologies/tyk-identity-broker/commit/46f70420e0911e4e8b638575e29d394c227c75d0"},{"url":"https://github.com/TykTechnologies/tyk-identity-broker/releases/tag/v1.1.1"},{"url":"https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMTYKTECHNOLOGIESTYKIDENTITYBROKER-1089720"}],"tags":["osv","go"],"epss":0.01011,"epssPercentile":0.61579,"ingestedAt":"2026-07-09T18:56:35.921Z","slug":"CVE-2021-23365","body":"## Overview\n\nThe package github.com/tyktechnologies/tyk-identity-broker before 1.1.1 are vulnerable to Authentication Bypass via the Go XML parser which can cause SAML authentication bypass. This is because the XML parser doesn’t guarantee integrity in the XML round-trip (encoding/decoding XML data).\n\n## Affected packages\n\n- `github.com/tyktechnologies/tyk-identity-broker < 1.1.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/tyktechnologies/tyk-identity-broker 1.1.1`","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}