BIT-KEYCLOAK-2026-15571 Flaw in the legacy client-initiated account-linking endpoint of Keycloak

A flaw was found in the legacy client-initiated account-linking endpoint of Keycloak, a widely used open-source identity and access management solution. The mechanism used to protect the account-linking process from unauthorized requests relies on a hash that can be predicted by a malicious OIDC...

OSV-2026-1189 Global-buffer-overflow in oidc_cfg_redirect_urls_allowed_get

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=550474749 Crash type: Global-buffer-overflow READ 8 Crash state: oidccfgredirecturlsallowedget oidcvalidateredirecturl fuzzurl.c...

GHSA-V2WP-FRMC-5Q3V

creationtimestamp| type| source ---|---|--- 2026-08-19 07:31:59+00:00| seen| https://gist.github.com/alon710/048e89a8b6d23388e5627d9e6207e2ad...

CVE-2026-15571

A flaw was found in the legacy client-initiated account-linking endpoint of Keycloak, a widely used open-source identity and access management solution. The mechanism used to protect the account-linking process from unauthorized requests relies on a hash that can be predicted by a malicious OIDC...

Critical: Red Hat Security Advisory: Red Hat build of Keycloak 26.6.6 Images Security Update

New images are available for Red Hat build of Keycloak 26.6.6 and Red Hat build of Keycloak 26.6.6 Operator, running on OpenShift Container Platform Red Hat build of Keycloak is an integrated sign-on solution, available as a Red Hat JBoss Middleware for OpenShift containerized image. The Red Hat...

EUVD-2026-61238

A flaw was found in the legacy client-initiated account-linking endpoint of Keycloak, a widely used open-source identity and access management solution. The mechanism used to protect the account-linking process from unauthorized requests relies on a hash that can be predicted by a malicious OIDC...

CVE-2026-15571

Keycloak's legacy client-initiated account-linking endpoint uses a predictable hash to protect against unauthorized requests. A malicious OIDC client can forge a valid linking URL after tricking a victim to authenticate, connecting the victim's account to the attacker's external identity and enab...

CVE-2026-15571 Keycloak-services: keycloak-services: predictable account-linking hash enables account takeover via malicious oidc client

A flaw was found in the legacy client-initiated account-linking endpoint of Keycloak, a widely used open-source identity and access management solution. The mechanism used to protect the account-linking process from unauthorized requests relies on a hash that can be predicted by a malicious OIDC...

CVE-2026-15571

A flaw was found in the legacy client-initiated account-linking endpoint of Keycloak, a widely used open-source identity and access management solution. The mechanism used to protect the account-linking process from unauthorized requests relies on a hash that can be predicted by a malicious OIDC...

Critical: Red Hat Security Advisory: Red Hat build of Keycloak 26.6.6 Security Update

New Red Hat build of Keycloak 26.6.6 packages are available from the Customer Portal Red Hat build of Keycloak 26.6.6 is a standalone server, based on the Keycloak project, that provides authentication and standards-based single sign-on capabilities for web and mobile applications. Security fixes...

keycloak-services: keycloak-services: Predictable account-linking hash enables account takeover via malicious OIDC client

A flaw was found in the legacy client-initiated account-linking endpoint of Keycloak, a widely used open-source identity and access management solution. The mechanism used to protect the account-linking process from unauthorized requests relies on a hash that can be predicted by a malicious OIDC...

ANT-2026-W77T9B29 · supabase/postgres · other

other medium Severity Claude medium · Security research firm - · Maintainer - Discovered by Claude Mythos Preview REPORT Anthropic's analysis of this finding, sealed at approval. ANT-2026-W77T9B29: CI downloads unverified binary then assumes production AWS role The qemu-image-build GitHub Actions...

PT-2026-77310

Name of the Vulnerable Software and Affected Versions Keycloak affected versions not specified Description A flaw exists in the legacy client-initiated account-linking endpoint of Keycloak. The protection mechanism for the account-linking process uses a predictable hash, which a malicious OpenID...

CVE-2026-56677

9Router is an AI router & token saver. In 0.5.4 and earlier, the POST /api/auth/oidc/test endpoint in src/app/api/auth/oidc/test/route.js passes the user-controlled issuerUrl parameter to fetchOidcDiscovery in src/lib/auth/oidc.js without restricting private or loopback destinations, allowing...

NPM: 9Router: Authenticated Server-Side Request Forgery (SSRF) via OIDC Provider Test Endpoint

NPM: 9Router: Authenticated Server-Side Request Forgery SSRF via OIDC Provider Test Endpoint vulnerability discovered by ? in WordPress Npm 9router versions = 0.5.4...

9Router: Authenticated Server-Side Request Forgery (SSRF) via OIDC Provider Test Endpoint

Summary A Server-Side Request Forgery SSRF vulnerability exists in the 9Router dashboard via the /api/auth/oidc/test endpoint. The application accepts a user-controlled URL string through the issuerUrl parameter and performs an outbound HTTP request without validating if the destination IP belong...

GHSA-8G4W-4FFG-8VGX 9Router: Authenticated Server-Side Request Forgery (SSRF) via OIDC Provider Test Endpoint

Summary A Server-Side Request Forgery SSRF vulnerability exists in the 9Router dashboard via the /api/auth/oidc/test endpoint. The application accepts a user-controlled URL string through the issuerUrl parameter and performs an outbound HTTP request without validating if the destination IP belong...

CVE-2026-56677

9Router 0.5.4 and earlier is vulnerable to unauthenticated SSRF: the POST /api/auth/oidc/test endpoint passes a user-supplied issuerUrl to fetchOidcDiscovery() without blocking private/loopback IPs, allowing internal service scanning and reflection of OIDC discovery fields (token_endpoint, jwks_u...

CVE-2026-56677 9Router: Authenticated Server-Side Request Forgery (SSRF) via OIDC Provider Test Endpoint

9Router is an AI router & token saver. In 0.5.4 and earlier, the POST /api/auth/oidc/test endpoint in src/app/api/auth/oidc/test/route.js passes the user-controlled issuerUrl parameter to fetchOidcDiscovery in src/lib/auth/oidc.js without restricting private or loopback destinations, allowing...

EUVD-2026-60471

9Router is an AI router & token saver. In 0.5.4 and earlier, the POST /api/auth/oidc/test endpoint in src/app/api/auth/oidc/test/route.js passes the user-controlled issuerUrl parameter to fetchOidcDiscovery in src/lib/auth/oidc.js without restricting private or loopback destinations, allowing...