{"cve":"CVE-2026-47201","nvd":{"published":"2026-06-02T21:16:27.940","modified":"2026-07-22T19:10:00.120","status":"Analyzed","description":"authentik is an open-source identity provider. Prior to versions 2025.12.5, 2026.2.3, and 2026.5.1, authentik's SAML Source ACS endpoint is vulnerable to XML Signature Wrapping when validating upstream SAML responses. An attacker with any account at the upstream IdP can reuse a valid signed assertion to authenticate as another federated user. This issue has been patched in versions 2025.12.5, 2026.2.3, and 2026.5.1.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","score":8.5},"cwes":["CWE-347","CWE-20"],"references":["https://github.com/goauthentik/authentik/security/advisories/GHSA-c3m2-jqmq-pvp3"],"products":["goauthentik:authentik"],"source":"nvd","synced_at":"2026-10-19T22:37:48.043517290+00:00"},"epss":{"cve":"CVE-2026-47201","score":0.00182,"percentile":0.07767,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-c3m2-jqmq-pvp3","url":"https://osv.dev/vulnerability/GHSA-c3m2-jqmq-pvp3","summary":"authentik's XML Signature Wrapping in SAML Source ACS allows authentication as arbitrary federated user","modified":"2026-06-09T11:15:08.843640436Z","packages":[{"ecosystem":"Go","name":"goauthentik.io","purl":"pkg:golang/goauthentik.io","ranges":["<0.0.0-20260528144335-a370d76d23c7"],"fixed":["0.0.0-20260528144335-a370d76d23c7"]}]}],"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."]}