{"id":"CVE-2026-41569","state":"PUBLISHED","title":"authentik: WS-Federation wreply origin bypass can exfiltrate signed login responses to attacker-controlled endpoints","description":"authentik is an open-source identity provider. Prior to version 2026.2.3, the WS-Federation provider validates the user-supplied wreply parameter using a raw string prefix check rather than proper URL parsing. An attacker who can craft a login link can supply a wreply value on a different origin that passes the check (e.g. https://portal.example.com.evil.tld/), causing the victim's browser to POST the signed WS-Federation login response to attacker-controlled infrastructure. This issue has been patched in version 2026.2.3.","publishedAt":"2026-06-02T20:30:21.664Z","updatedAt":"2026-06-03T14:29:52.842Z","severity":{"score":6.9,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["goauthentik authentik"],"affected":[{"vendor":"goauthentik","product":"authentik","versions":[{"version":"< 2026.2.3","status":"affected"}]}],"references":["https://github.com/goauthentik/authentik/security/advisories/GHSA-995q-72cw-cfw3"],"weaknesses":["CWE-601"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/41xxx/CVE-2026-41569.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-41569","state":"PUBLISHED","datePublished":"2026-06-02T20:30:21.664Z","dateUpdated":"2026-06-03T14:29:52.842Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-21T14:15:21.957Z"},"containers":{"cna":{"title":"authentik: WS-Federation wreply origin bypass can exfiltrate signed login responses to attacker-controlled endpoints","descriptions":[{"lang":"en","value":"authentik is an open-source identity provider. Prior to version 2026.2.3, the WS-Federation provider validates the user-supplied wreply parameter using a raw string prefix check rather than proper URL parsing. An attacker who can craft a login link can supply a wreply value on a different origin that passes the check (e.g. https://portal.example.com.evil.tld/), causing the victim's browser to POST the signed WS-Federation login response to attacker-controlled infrastructure. This issue has been patched in version 2026.2.3."}],"affected":[{"vendor":"goauthentik","product":"authentik","versions":[{"version":"< 2026.2.3","status":"affected"}]}],"references":[{"url":"https://github.com/goauthentik/authentik/security/advisories/GHSA-995q-72cw-cfw3","name":"https://github.com/goauthentik/authentik/security/advisories/GHSA-995q-72cw-cfw3","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.9,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-601","lang":"en","description":"CWE-601: URL Redirection to Untrusted Site ('Open Redirect')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-02T20:30:21.664Z"},"source":{"advisory":"GHSA-995q-72cw-cfw3","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-03T14:28:31.094643Z","id":"CVE-2026-41569","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-03T14:29:52.842Z"}}]}}}