GHSA-G5H5-M4HM-XJRR ZITADEL: Missing Token Audience Validation (`aud`) in JWT IdP Provider

Summary An authentication bypass vulnerability was discovered in ZITADEL's external JWT Identity Provider IdP implementation. When validating JSON Web Tokens JWTs from an external provider, ZITADEL properly checks the token's cryptographic signature and issuer iss, but it fails to validate the...

ZITADEL: Missing Token Audience Validation (`aud`) in JWT IdP Provider

Summary An authentication bypass vulnerability was discovered in ZITADEL's external JWT Identity Provider IdP implementation. When validating JSON Web Tokens JWTs from an external provider, ZITADEL properly checks the token's cryptographic signature and issuer iss, but it fails to validate the...

PT-2026-50738

Name of the Vulnerable Software and Affected Versions ZITADEL versions 4.0.0 through 4.11.0 ZITADEL versions 3.0.0 through 3.4.11 Description An authentication bypass exists in the external JWT Identity Provider IdP implementation. While the system validates the cryptographic signature and the...

CVE-2026-50627

A flaw was found in Apache CXF. The JwtAccessTokenValidator class fails to properly validate the 'aud' Audience claims within incoming JSON Web Token JWT access tokens. This vulnerability allows an attacker to reuse a JWT, originally intended for one resource server, against a different resource...

Improper Access Control

Keycloak is vulnerable to Improper Access Control. The vulnerability is due to insufficient audience restriction enforcement in the OpenID Connect token introspection endpoint, which allows an authenticated confidential client to access sensitive token claims intended for other resource servers...

CVE-2026-50627

The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' Audience claims of incoming JWT access tokens. This allows a JWT issued for one Resource Server to be successfully replayed against a completely different Resource Server, leading to Token Confusion/Routing attacks. Users...

CVE-2026-50627 Apache CXF: OAuth2: Missing JWT Audience and Issuer Validation in Access Token Validator

The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' Audience claims of incoming JWT access tokens. This allows a JWT issued for one Resource Server to be successfully replayed against a completely different Resource Server, leading to Token Confusion/Routing attacks. Users...

CVE-2026-50627

The CVE-2026-50627 issue affects Apache CXF’s JwtAccessTokenValidator, which fails to validate the aud (Audience) claim in incoming JWT access tokens. As described in multiple sources (NVD/Red Hat/CVE List/etc.), a token issued for one Resource Server could be replayed against a different Resourc...

CVE-2026-50627 Apache CXF: OAuth2: Missing JWT Audience and Issuer Validation in Access Token Validator

The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' Audience claims of incoming JWT access tokens. This allows a JWT issued for one Resource Server to be successfully replayed against a completely different Resource Server, leading to Token Confusion/Routing attacks. Users...

EUVD-2026-36395

The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' Audience claims of incoming JWT access tokens. This allows a JWT issued for one Resource Server to be successfully replayed against a completely different Resource Server, leading to Token Confusion/Routing attacks. Users...

CVE-2026-50627 Apache CXF: OAuth2: Missing JWT Audience and Issuer Validation in Access Token Validator

The JwtAccessTokenValidator class in Apache CXF fails to validate the 'aud' Audience claims of incoming JWT access tokens. This allows a JWT issued for one Resource Server to be successfully replayed against a completely different Resource Server, leading to Token Confusion/Routing attacks. Users...

PT-2026-48846

Name of the Vulnerable Software and Affected Versions Apache CXF versions prior to 4.2.2 Apache CXF versions prior to 4.1.7 Description The JwtAccessTokenValidator class fails to validate the aud Audience claims of incoming JWT access tokens. This flaw enables a JWT issued for one Resource Server...

CVE-2026-44428

The MCP Registry provides MCP clients with a list of MCP servers, like an app store for MCP servers. Prior to 1.7.6, the client-side and server-side GitHub OIDC flow is bound only to a global audience string, not to the specific registry instance being targeted. On the client side, the publisher...

CVE-2026-41577

authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, the SAML source response processor ResponseProcessor.parse does not validate the Conditions element on assertions. NotBefore, NotOnOrAfter, and AudienceRestriction are all ignored. This allows replay of expir...

CVE-2026-40946

Oxia is a metadata store and coordination system. Prior to 0.16.2, the OIDC authentication provider unconditionally sets SkipClientIDCheck: true in the go-oidc verifier configuration, disabling the standard audience aud claim validation at the library level. This allows tokens issued for unrelate...

BIT-AUTHENTIK-2026-41577 authentik: SAML source does not validate Conditions, timing, or audience on assertions

authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, the SAML source response processor ResponseProcessor.parse does not validate the Conditions element on assertions. NotBefore, NotOnOrAfter, and AudienceRestriction are all ignored. This allows replay of expir...

CVE-2026-41577 authentik: SAML source does not validate Conditions, timing, or audience on assertions

authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, the SAML source response processor ResponseProcessor.parse does not validate the Conditions element on assertions. NotBefore, NotOnOrAfter, and AudienceRestriction are all ignored. This allows replay of expir...

CVE-2026-41577

CVE-2026-41577 affects the open‑source identity provider authentik. The SAML source response processor (ResponseProcessor.parse()) does not validate the Conditions element on assertions prior to versions 2025.12.5 and 2026.2.3. Specifically, NotBefore, NotOnOrAfter, and AudienceRestriction are ig...

CVE-2026-41577 authentik: SAML source does not validate Conditions, timing, or audience on assertions

authentik is an open-source identity provider. Prior to versions 2025.12.5 and 2026.2.3, the SAML source response processor ResponseProcessor.parse does not validate the Conditions element on assertions. NotBefore, NotOnOrAfter, and AudienceRestriction are all ignored. This allows replay of expir...

GHSA-3W4H-G9F5-J84P Casdoor does not validate the AudienceRestriction element in SAML assertions

In Casdoor versions 2.362.0 and earlier, the SAML service provider implementation does not validate the AudienceRestriction element in SAML assertions. The buildSp function in object/samlsp.go never sets AudienceURI on the gosaml2 SAMLServiceProvider struct and never inspects...