Keycloak Vulnerable to Improper Validation of Specified Quantity in Input

A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subjecttoken JSON Web Token JWT to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client...

GHSA-RR5Q-3XWR-F323 Keycloak Vulnerable to Improper Validation of Specified Quantity in Input

A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subjecttoken JSON Web Token JWT to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client...

CVE-2026-9704

A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subjecttoken JSON Web Token JWT to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client...

CVE-2026-9704 Keycloak: keycloak: privilege escalation due to oversized subject_token jwt

A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subjecttoken JSON Web Token JWT to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client...

EUVD-2026-32300

A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subjecttoken JSON Web Token JWT to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client...

CVE-2026-9704

A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subjecttoken JSON Web Token JWT to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client...

CVE-2026-9704 Keycloak: keycloak: privilege escalation due to oversized subject_token jwt

A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subjecttoken JSON Web Token JWT to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client...

Improper Validation of Specified Quantity in Input

Overview org.keycloak:keycloak-services is an open source identity and access management solution for modern applications and services. Affected versions of this package are vulnerable to Improper Validation of Specified Quantity in Input in the TokenEndpoint endpoint when an oversized subjecttok...

PT-2026-55159

A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subject token JSON Web Token JWT to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client...

Keycloak 安全漏洞

Keycloak is an open-source identity and access management solution developed by Keycloak itself. There is a security vulnerability in Keycloak. This vulnerability arises when authenticated low-privilege users can send excessively large SubjectToken JWT tokens to the TokenEndpoint. When the token...

BIT-AUTHENTIK-2024-52287 authentik performs insufficient validation of OAuth scopes

authentik is an open-source identity provider. When using the clientcredentials or devicecode OAuth grants, it was possible for an attacker to get a token from authentik with scopes that haven't been configured in authentik. authentik 2024.8.5 and 2024.10.3 fix this issue...

CVE-2026-39976

Laravel Passport provides OAuth2 server support to Laravel. From 13.0.0 to before 13.7.1, there is an Authentication Bypass for clientcredentials tokens. the league/oauth2-server library sets the JWT sub claim to the client identifier since there's no user. The token guard then passes this value ...

EUVD-2026-20970

Laravel Passport provides OAuth2 server support to Laravel. From 13.0.0 to before 13.7.1, there is an Authentication Bypass for clientcredentials tokens. the league/oauth2-server library sets the JWT sub claim to the client identifier since there's no user. The token guard then passes this value ...

CVE-2026-39976

Laravel Passport provides OAuth2 server support to Laravel. From 13.0.0 to before 13.7.1, there is an Authentication Bypass for clientcredentials tokens. the league/oauth2-server library sets the JWT sub claim to the client identifier since there's no user. The token guard then passes this value ...

CVE-2026-39976

CVE-2026-39976 affects Laravel Passport's TokenGuard in versions 13.0.0–13.7.0. The underlying league/oauth2-server sets the JWT sub claim to the client identifier (no user) and TokenGuard passes this value to retrieveById() without validating that it is a user, allowing a client_credentials toke...

CVE-2026-39976 Laravel Passport's TokenGuard Authenticates Unrelated User for Client Credentials Tokens

Laravel Passport provides OAuth2 server support to Laravel. From 13.0.0 to before 13.7.1, there is an Authentication Bypass for clientcredentials tokens. the league/oauth2-server library sets the JWT sub claim to the client identifier since there's no user. The token guard then passes this value ...

CVE-2026-39976 Laravel Passport's TokenGuard Authenticates Unrelated User for Client Credentials Tokens

Laravel Passport provides OAuth2 server support to Laravel. From 13.0.0 to before 13.7.1, there is an Authentication Bypass for clientcredentials tokens. the league/oauth2-server library sets the JWT sub claim to the client identifier since there's no user. The token guard then passes this value ...

passport 授权问题漏洞

Passport is a Node.js authentication middleware developed by Jared Hanson, a personal developer in the United States. Versions of Passport prior to 13.0.0 and 13.7.1 had an authorization vulnerability. This vulnerability stemmed from an client-credentials token authentication process, which could...

PT-2026-31663

Laravel Passport provides OAuth2 server support to Laravel. From 13.0.0 to before 13.7.1, there is an Authentication Bypass for client credentials tokens. the league/oauth2-server library sets the JWT sub claim to the client identifier since there's no user. The token guard then passes this value...

GHSA-349C-2H2F-MXF6 Laravel Passport: TokenGuard Authenticates Unrelated User for Client Credentials Tokens

Impact Authentication Bypass for clientcredentials tokens. the league/oauth2-server library sets the JWT sub claim to the client identifier since there's no user. The token guard then passes this value to retrieveById without validating it's actually a user identifier, potentially resolving an...