GHSA-8FCC-W5HV-4GXV googleapis/mcp-toolbox: authentication bypass vulnerability in the generic opaque token validation path (validateOpaqueToken)

An authentication bypass vulnerability exists in the generic opaque token validation path validateOpaqueToken of googleapis/mcp-toolbox. When verifying an unparsed opaque token via an OAuth 2.0 introspection endpoint RFC 7662, the toolbox decodes the response into an introspectResp struct where t...

CVE-2026-11718

The CVE-2026-11718 entry concerns an authentication bypass in googleapis/mcp-toolbox: during opaque-token validation via an OAuth 2.0 introspection endpoint, the code decodes the response and checks issuer with the condition a.issuer != "" && iss != "". If the introspection response omits iss, is...

PT-2026-50659

Name of the Vulnerable Software and Affected Versions googleapis/mcp-toolbox affected versions not specified Description An authentication bypass exists in the generic opaque token validation path validateOpaqueToken. When verifying an unparsed opaque token via an OAuth 2.0 introspection endpoint...

PT-2026-50660

Name of the Vulnerable Software and Affected Versions googleapis/mcp-toolbox affected versions not specified Description An authentication bypass exists in the generic opaque token validation path validateOpaqueToken. When validating an opaque token via an OAuth 2.0 introspection endpoint, the...

PT-2026-48845

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 An authentication bypass exists in the OAuth2 TokenIntrospectionService. A missing 'throw' keyword in the security context check allows unauthenticated network...

CVE-2026-41164

nuts-node is the reference implementation of the Nuts specification. Prior to 6.2.3 and 5.4.31, the v1 access token introspection endpoint /auth/v1/introspectaccesstoken accepts any JWT signed by a key present on the node, without validating the JWT type, issuer-to-key binding, or required claims...

CVE-2026-41164 nuts-node: JWT type confusion in v1 access token introspection allows VP replay as access token

nuts-node is the reference implementation of the Nuts specification. Prior to 6.2.3 and 5.4.31, the v1 access token introspection endpoint /auth/v1/introspectaccesstoken accepts any JWT signed by a key present on the node, without validating the JWT type, issuer-to-key binding, or required claims...

EUVD-2026-31940

nuts-node is the reference implementation of the Nuts specification. Prior to 6.2.3 and 5.4.31, the v1 access token introspection endpoint /auth/v1/introspectaccesstoken accepts any JWT signed by a key present on the node, without validating the JWT type, issuer-to-key binding, or required claims...

CVE-2026-41671 Admidio: OIDC Token Introspection Endpoint Returns Active for All Tokens Without Validation

Admidio is an open-source user management solution. Prior to version 5.0.9, the OIDC token introspection endpoint /modules/sso/index.php/oidc/introspect always returns "active": true for every request, regardless of whether a valid token is provided, whether the token is expired, revoked, or...

nuts-node has JWT type confusion in v1 access token introspection that allows VP replay as access token

Summary The v1 access token introspection endpoint /auth/v1/introspectaccesstoken accepts any JWT signed by a key present on the node, without validating the JWT type, issuer-to-key binding, or required claims. This allows a Verifiable Presentation VP JWT to be replayed as an access token and...

GHSA-9HMG-827W-9RHJ nuts-node has JWT type confusion in v1 access token introspection that allows VP replay as access token

Summary The v1 access token introspection endpoint /auth/v1/introspectaccesstoken accepts any JWT signed by a key present on the node, without validating the JWT type, issuer-to-key binding, or required claims. This allows a Verifiable Presentation VP JWT to be replayed as an access token and...

PT-2026-37245

Name of the Vulnerable Software and Affected Versions nuts-node versions prior to 5.4.31 nuts-node versions prior to 6.2.3 Description The v1 access token introspection endpoint '/auth/v1/introspect access token' accepts any JSON Web Token JWT signed by a key present on the node without validatin...

CVE-2026-32269

Parse Server vulnerability CVE-2026-32269 affects deployments using the OAuth2 adapter with both appidField and appIds configured. The issue stems from incorrect validation of app IDs where a malformed value is sent to the token introspection endpoint instead of the user’s actual access token, po...

CVE-2024-0560

A vulnerability was found in 3Scale, when used with Keycloak 15 or RHSSO 7.5.0 and superiors. When the authtype is use3scaleoidcissuerendpoint, the Token Introspection policy discovers the Token Introspection endpoint from the tokenintrospectionendpoint field, but the field was removed on RH-SSO...