CVE-2026-18569

A flaw was found in the backchannel logout endpoint of the keycloak-services component, which is part of the Red Hat Build of Keycloak. This component handles authentication and session management for applications. The issue occurs when an OIDC identity provider is configured to skip signature...

CVE-2026-18569 Keycloak-services: keycloak-services: oidc backchannel logout accepts unsigned forged logout tokens

A flaw was found in the backchannel logout endpoint of the keycloak-services component, which is part of the Red Hat Build of Keycloak. This component handles authentication and session management for applications. The issue occurs when an OIDC identity provider is configured to skip signature...

CVE-2026-18569

The vulnerability CVE-2026-18569 affects the Red Hat Build of Keycloak, specifically the keycloak-services component’s backchannel logout endpoint. The root cause is when an OIDC identity provider is configured to skip signature validation, causing the system to accept logout requests with no cry...

CVE-2026-18569

A flaw was found in the backchannel logout endpoint of the keycloak-services component, which is part of the Red Hat Build of Keycloak. This component handles authentication and session management for applications. The issue occurs when an OIDC identity provider is configured to skip signature...

CVE-2026-18569 Keycloak-services: keycloak-services: oidc backchannel logout accepts unsigned forged logout tokens

A flaw was found in the backchannel logout endpoint of the keycloak-services component, which is part of the Red Hat Build of Keycloak. This component handles authentication and session management for applications. The issue occurs when an OIDC identity provider is configured to skip signature...

EUVD-2026-52575

A flaw was found in the backchannel logout endpoint of the keycloak-services component, which is part of the Red Hat Build of Keycloak. This component handles authentication and session management for applications. The issue occurs when an OIDC identity provider is configured to skip signature...

CVE-2026-18569

A flaw was found in the backchannel logout endpoint of the keycloak-services component, which is part of the Red Hat Build of Keycloak. This component handles authentication and session management for applications. The issue occurs when an OIDC identity provider is configured to skip signature...

PT-2026-67641

A flaw was found in the backchannel logout endpoint of the keycloak-services component, which is part of the Red Hat Build of Keycloak. This component handles authentication and session management for applications. The issue occurs when an OIDC identity provider is configured to skip signature...

SUSE CVE-2026-55671

ZITADEL is an open source identity management platform. From 4.0.0-rc.1 through 4.15.1, ZITADEL's HTTP notification channels, OIDC BackChannel Logout, and SAML metadata URL fetches do not consistently validate user-defined URLs against protected denylist handling, allowing server-side requests to...

Fedora 44 : roundcubemail (2026-517daa8d64)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-517daa8d64 advisory. Release 1.7.2 - Add HEAD request handler to the static.php - Fix so the oauthpasswordclaim claim is retrieved via token or userinfo request 9631 - F...

CVE-2026-55671

ZITADEL is an open source identity management platform. From 4.0.0-rc.1 through 4.15.1, ZITADEL's HTTP notification channels, OIDC BackChannel Logout, and SAML metadata URL fetches do not consistently validate user-defined URLs against protected denylist handling, allowing server-side requests to...

CVE-2026-55671

ZITADEL is an open source identity management platform. From 4.0.0-rc.1 through 4.15.1, ZITADEL's HTTP notification channels, OIDC BackChannel Logout, and SAML metadata URL fetches do not consistently validate user-defined URLs against protected denylist handling, allowing server-side requests to...

EUVD-2026-42978

ZITADEL is an open source identity management platform. From 4.0.0-rc.1 through 4.15.1, ZITADEL's HTTP notification channels, OIDC BackChannel Logout, and SAML metadata URL fetches do not consistently validate user-defined URLs against protected denylist handling, allowing server-side requests to...

CVE-2026-55671 ZITADEL: Server-Side Request Forgery (SSRF) and Denylist Bypass in Outgoing HTTP Components

ZITADEL is an open source identity management platform. From 4.0.0-rc.1 through 4.15.1, ZITADEL's HTTP notification channels, OIDC BackChannel Logout, and SAML metadata URL fetches do not consistently validate user-defined URLs against protected denylist handling, allowing server-side requests to...

CVE-2026-59219

Open WebUI 0.9.0–0.10.0: with Redis configured, the terminal websocket first-message authentication used decode_token without a Redis-backed is_valid_token revocation check, allowing revoked JWTs to continue authenticating realtime connections. Fixed in version 0.10.0. This affects realtime endpo...

org.keycloak.protocol.oidc.grants: org.keycloak.services.managers: Keycloak: Server-Side Request Forgery via OIDC token endpoint manipulation

A flaw was found in Keycloak. An authenticated attacker can perform Server-Side Request Forgery SSRF by manipulating the clientsessionhost parameter during refresh token requests. This occurs when a Keycloak client is configured to use the backchannel.logout.url with the application.session.host...

GHSA-29JH-8CFQ-RR8X ZITADEL: Server-Side Request Forgery (SSRF) and Denylist Bypass in Outgoing HTTP Components

Summary A Server-Side Request Forgery SSRF vulnerability was discovered in Zitadel affecting: HTTP Notification Channels: Used as an alternative to SMTP/Twilio configurations, sending payloads to user-defined URLs via HTTP POST webhooks. OIDC BackChannel Logout: Terminates sessions across differe...

PT-2026-50740

Name of the Vulnerable Software and Affected Versions Zitadel versions 4.0.0 through 4.15.1 Zitadel versions 3.0.0 through 3.4.11 Description A Server-Side Request Forgery SSRF issue exists in components that handle outgoing HTTP requests, specifically HTTP Notification Channels, OIDC BackChannel...

EUVD-2026-16142

A flaw was found in Keycloak. An authenticated attacker can perform Server-Side Request Forgery SSRF by manipulating the clientsessionhost parameter during refresh token requests. This occurs when a Keycloak client is configured to use the backchannel.logout.url with the application.session.host...

Server-side Request Forgery (SSRF)

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 Server-side Request Forgery SSRF via the clientsessionhost parameter during refresh token requests when the...