CVE-2026-94612

authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an authentik SAML Source verifies an assertion's signature and validity period but does not ensure that the identity provider issued the assertion for that Source or in response to a login request from that...

CVE-2026-94612

The authentik identity provider is vulnerable to an authentication bypass via assertion confusion in SAML Sources prior to versions 2026.2.7, 2026.5.7, and 2026.8.2. The root cause is that the SAML Source verifies an assertion's signature and validity period but fails to ensure the assertion was ...

CVE-2026-94612 authentik: Authentication bypass via assertion confusion in SAML sources

authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an authentik SAML Source verifies an assertion's signature and validity period but does not ensure that the identity provider issued the assertion for that Source or in response to a login request from that...

CVE-2026-94612 authentik: Authentication bypass via assertion confusion in SAML sources

authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an authentik SAML Source verifies an assertion's signature and validity period but does not ensure that the identity provider issued the assertion for that Source or in response to a login request from that...

EUVD-2026-86276

authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an authentik SAML Source verifies an assertion's signature and validity period but does not ensure that the identity provider issued the assertion for that Source or in response to a login request from that...

CVE-2026-94612 authentik: Authentication bypass via assertion confusion in SAML sources

authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an authentik SAML Source verifies an assertion's signature and validity period but does not ensure that the identity provider issued the assertion for that Source or in response to a login request from that...

CVE-2026-94613 authentik: Denial of Service via Document Type Declarations in SAML Messages

authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an unauthenticated attacker can submit a malformed SAML message to an authentik deployment using SAML in either the identity-provider or SAML source role. The message can stop the worker handling...

CVE-2026-94613 authentik: Denial of Service via Document Type Declarations in SAML Messages

authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an unauthenticated attacker can submit a malformed SAML message to an authentik deployment using SAML in either the identity-provider or SAML source role. The message can stop the worker handling...

CVE-2026-94612: Improper Authentication

authentik is an open-source identity provider. Prior to 2026.2.7, 2026.5.7, and 2026.8.2, an authentik SAML Source verifies an assertion's signature and validity period but does not ensure that the identity provider issued the assertion for that Source or in response to a login request from that...

PT-2026-98035

Name of the Vulnerable Software and Affected Versions authentik versions prior to 2026.2.7 authentik versions prior to 2026.5.7 authentik versions prior to 2026.8.2 Description An issue exists in the SAML Source where the system verifies the signature and validity period of an assertion but fails...

PT-2026-98036

Name of the Vulnerable Software and Affected Versions authentik versions prior to 2026.2.7 authentik versions prior to 2026.5.7 authentik versions prior to 2026.8.2 Description An unauthenticated attacker can submit a malformed SAML message to a deployment using SAML in the identity-provider or...

EUVD-2026-61062

authentik is an open-source identity provider. Prior to 2026.2.6 and 2026.5.5, an inbound SAML Source configured with the non-default USERNAMELINK or EMAILLINK user-matching mode interprets an XML comment in a NameID differently from the identity provider's signed assertion. An attacker with an...

CVE-2026-57580: Interpretation Conflict

authentik is an open-source identity provider. Prior to 2026.2.6 and 2026.5.5, an inbound SAML Source configured with the non-default USERNAMELINK or EMAILLINK user-matching mode interprets an XML comment in a NameID differently from the identity provider's signed assertion. An attacker with an...

CVE-2026-47201 authentik: XML Signature Wrapping in SAML Source ACS allows authentication as arbitrary federated user

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...

CVE-2026-47201 authentik: XML Signature Wrapping in SAML Source ACS allows authentication as arbitrary federated user

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...

CVE-2026-47201: Improper Input Validation

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...

authentik's XML Signature Wrapping in SAML Source ACS allows authentication as arbitrary federated user

Summary 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. Patches authentik 2026.5.1, 2026.2.4 and...

PT-2026-45029

Name of the Vulnerable Software and Affected Versions authentik versions prior to 2025.12.5 authentik versions prior to 2026.2.3 authentik versions prior to 2026.5.1 Description The SAML Source ACS endpoint is susceptible to XML Signature Wrapping, a technique where a valid signature is used to...

CVE-2026-40165: Improper Authentication

authentik is an open-source identity provider. Versions 2025.12.4 and prior, and versions 2026.2.0-rc1 through 2026.2.2 were vulnerable to Authentication Bypass through SAML NameID XML Comment Injection. Due to how authentik extracted the NameID value from a SAML assertion, it was possible for an...

CVE-2026-25922

authentik is an open-source identity provider. Prior to 2025.8.6, 2025.10.4, and 2025.12.4, when using a SAML Source that has the option Verify Assertion Signature under Verification Certificate enabled and not Verify Response Signature, or does not have the Encryption Certificate setting under...