EUVD-2026-66188

Doorkeeper is an OAuth 2 provider for Ruby on Rails. In version 1.9.0, an attacker who knows only a dynamically registered client's clientid, which is public information, can authenticate as that client at the token endpoint and obtain an access token without providing its clientsecret. This occu...

CVE-2026-44476 Doorkeeper OpenID Connect: Dynamic Client Registration feature creates public clients with client_secret

Doorkeeper is an OAuth 2 provider for Ruby on Rails. In version 1.9.0, an attacker who knows only a dynamically registered client's clientid, which is public information, can authenticate as that client at the token endpoint and obtain an access token without providing its clientsecret. This occu...

CVE-2026-44476

Doorkeeper is an OAuth 2 provider for Ruby on Rails. In version 1.9.0, an attacker who knows only a dynamically registered client's clientid, which is public information, can authenticate as that client at the token endpoint and obtain an access token without providing its clientsecret. This occu...

CVE-2026-70665

Doorkeeper OpenID Connect (a Rails OpenID Connect provider built on Doorkeeper) is vulnerable to scope privilege escalation prior to version 1.10.4 . The Dynamic Client Registration (DCR) endpoint (DynamicClientRegistrationController#application_params) assigns the scope parameter directly from p...

EUVD-2026-66194

Doorkeeper OpenID Connect implements an OpenID Connect authentication provider for Rails applications on top of Doorkeeper. Prior to 1.10.4, the Dynamic Client Registration DCR endpoint persists client-supplied scopes without validating them against the server's configured scope set. Under certai...

CVE-2026-70665 Doorkeeper OpenID Connect: DCR endpoint persists unvalidated client-supplied scopes

Doorkeeper OpenID Connect implements an OpenID Connect authentication provider for Rails applications on top of Doorkeeper. Prior to 1.10.4, the Dynamic Client Registration DCR endpoint persists client-supplied scopes without validating them against the server's configured scope set. Under certai...

CVE-2026-70665 Doorkeeper OpenID Connect: DCR endpoint persists unvalidated client-supplied scopes

Doorkeeper OpenID Connect implements an OpenID Connect authentication provider for Rails applications on top of Doorkeeper. Prior to 1.10.4, the Dynamic Client Registration DCR endpoint persists client-supplied scopes without validating them against the server's configured scope set. Under certai...

CVE-2026-70665

Doorkeeper OpenID Connect implements an OpenID Connect authentication provider for Rails applications on top of Doorkeeper. Prior to 1.10.4, the Dynamic Client Registration DCR endpoint persists client-supplied scopes without validating them against the server's configured scope set. Under certai...

CVE-2026-70665 Doorkeeper OpenID Connect: DCR endpoint persists unvalidated client-supplied scopes

Doorkeeper OpenID Connect implements an OpenID Connect authentication provider for Rails applications on top of Doorkeeper. Prior to 1.10.4, the Dynamic Client Registration DCR endpoint persists client-supplied scopes without validating them against the server's configured scope set. Under certai...

CVE-2026-70665

Doorkeeper OpenID Connect implements an OpenID Connect authentication provider for Rails applications on top of Doorkeeper. Prior to 1.10.4, the Dynamic Client Registration DCR endpoint persists client-supplied scopes without validating them against the server's configured scope set. Under certai...

CVE-2026-79786

Coroot's unauthenticated MCP OAuth dynamic client registration endpoint accepts any syntactically valid redirect URI without validation, allowing attackers to register clients pointing to attacker-controlled hosts. Attackers can send authorization URLs to signed-in users, capture their...

EUVD-2026-65698

Coroot's unauthenticated MCP OAuth dynamic client registration endpoint accepts any syntactically valid redirect URI without validation, allowing attackers to register clients pointing to attacker-controlled hosts. Attackers can send authorization URLs to signed-in users, capture their...

CVE-2026-79786 Coroot 1.20.2 through 1.24.5 Unvalidated Redirect URI in MCP OAuth Client Registration

Coroot's unauthenticated MCP OAuth dynamic client registration endpoint accepts any syntactically valid redirect URI without validation, allowing attackers to register clients pointing to attacker-controlled hosts. Attackers can send authorization URLs to signed-in users, capture their...

CVE-2026-79786 Coroot 1.20.2 through 1.24.5 Unvalidated Redirect URI in MCP OAuth Client Registration

Coroot's unauthenticated MCP OAuth dynamic client registration endpoint accepts any syntactically valid redirect URI without validation, allowing attackers to register clients pointing to attacker-controlled hosts. Attackers can send authorization URLs to signed-in users, capture their...

BIT-KEYCLOAK-2026-9705 Keycloak: keycloak: attacker can re-enable and take over disabled clients via registration access token

A flaw was found in Keycloak's client registration service. A remote attacker, possessing a previously issued Registration Access Token RAT, could exploit this vulnerability to re-enable a client that an administrator had explicitly disabled. This bypasses security controls, allowing the attacker...

BIT-KEYCLOAK-2026-16102 Keycloak-services: keycloak-services: default dcr policy allows role forgery via user property mappers

A flaw was found in the Dynamic Client Registration DCR component of Keycloak, an identity and access management solution. The default DCR policy fails to properly validate the claim path for User Property mappers, allowing them to write values to sensitive internal claim locations. An attacker...

BIT-KEYCLOAK-2026-15572 Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation

A flaw was found in Keycloak's Dynamic Client Registration DCR security policy management. The "Allowed Protocol Mapper Types" policy, which restricts which types of data mappers a client can use, fails to re-validate the mapper type during a client update if the mapper's configuration remains...

Privilege Escalation

Keycloak is vulnerable to Improper Authorization. The vulnerability is due to the Dynamic Client Registration policy failing to re-validate protocol mapper types during client updates, allowing an attacker with client registration privileges to replace an allowed mapper with a restricted...

CVE-2026-44476: Improper Authentication

Doorkeeper is an OAuth 2 provider for Ruby on Rails. In version 1.9.0, an attacker who knows only a dynamically registered client's clientid, which is public information, can authenticate as that client at the token endpoint and obtain an access token without providing its clientsecret. This occu...

PT-2026-81890

Name of the Vulnerable Software and Affected Versions Doorkeeper OpenID Connect versions prior to 1.10.4 Description The Dynamic Client Registration DCR endpoint persists client-supplied scopes without validating them against the server's configured scope set. In the...