{"cve":"CVE-2021-23365","nvd":{"published":"2021-04-26T10:15:12.597","modified":"2026-06-17T03:38:37.870","status":"Modified","description":"The 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).","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1},"cwes":["CWE-287"],"references":["https://github.com/TykTechnologies/tyk-identity-broker/commit/243092965b0f93a95a14cb882b5b9a3df61dd5c0","https://github.com/TykTechnologies/tyk-identity-broker/commit/46f70420e0911e4e8b638575e29d394c227c75d0","https://github.com/TykTechnologies/tyk-identity-broker/pull/147","https://github.com/TykTechnologies/tyk-identity-broker/releases/tag/v1.1.1","https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMTYKTECHNOLOGIESTYKIDENTITYBROKER-1089720"],"products":["tyk:tyk-identity-broker"],"source":"nvd","synced_at":"2026-10-19T21:17:01.373894544+00:00"},"epss":{"cve":"CVE-2021-23365","score":0.01011,"percentile":0.63168,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-599h-8wpj-75xj","url":"https://osv.dev/vulnerability/GHSA-599h-8wpj-75xj","summary":"Authentication Bypass in tyk-identity-broker","modified":"2026-07-08T06:50:00.359649527Z","packages":[{"ecosystem":"Go","name":"github.com/tyktechnologies/tyk-identity-broker","purl":"pkg:golang/github.com/tyktechnologies/tyk-identity-broker","ranges":["<1.1.1"],"fixed":["1.1.1"]}]},{"id":"GO-2022-0906","url":"https://osv.dev/vulnerability/GO-2022-0906","summary":"Authentication Bypass in tyk-identity-broker in github.com/TykTechnologies/tyk-identity-broker","modified":"2026-07-08T06:50:00.359649527Z","packages":[{"ecosystem":"Go","name":"github.com/TykTechnologies/tyk-identity-broker","purl":"pkg:golang/github.com/TykTechnologies/tyk-identity-broker","ranges":["<1.1.1"],"fixed":["1.1.1"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}