Keycloak vulnerable to session takeovers due to reuse of session identifiers

A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As...

ch.iterial.keycloak.plugins:keycloak-directus-plugin (>=0.1.0 <=0.7.0), com.charlyghislain.keycloak:keycloak-importexport (>=21.0.0 <=23.0.1) +101 more potentially affected by CVE-2025-12390 via org.keycloak:keycloak-services (>=1.0-alpha-1 <=25.0.6)

org.keycloak:keycloak-services MAVEN version =1.0-alpha-1, =0.1.0, =21.0.0, =1.4.10, =1.4.10, =1.4.10, =1.4.10, =1.4.10, =1.4.10, =1.4.10, =1.4.10, =1.4.10, =1.0.1, =1.0.2 - com.kleegroup.accelerator:accelerator-security-keycloakmfa =1.0.1 and more Source cves: CVE-2025-12390 Source advisory:...

GHSA-RG35-5V25-MQVP Keycloak vulnerable to session takeovers due to reuse of session identifiers

A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As...

EUVD-2025-36502

A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As...

Missing Critical Step in Authentication

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 Missing Critical Step in Authentication in the WebAuthn Attestation Statement verification. An attacker can...

ch.iterial.keycloak.plugins:keycloak-directus-plugin (>=0.1.0 <=0.7.0), com.c4-soft.springaddons:keycloak-grants-mapper (>=3.1.13-jdk1.8 <=3.1.14-jdk17) +186 more potentially affected by CVE-2025-12150 via org.keycloak:keycloak-services (>=10.0.0 <=26.5.0)

org.keycloak:keycloak-services MAVEN version =10.0.0, =0.1.0, =3.1.13-jdk1.8, =11.0.1, =1.2.6, =1.2.5, =1.2.4, =1.2.4, =1.2.4, =1.2.4, =1.2.4, =1.2.4, =1.2.4, =1.4.11 - com.github.wnameless.spring.boot.up:spring-boot-up-embedded-keycloak =24.3.0.0 -...

Session Fixation

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 Session Fixation in the backchannel logout when browser cookies are missing. An attacker using the same brows...

CVE-2025-12390

A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As...

CVE-2025-12390 Org.keycloak.protocol.oidc.endpoints.logoutendpoint: offline session takeover due to reused authentication session id

A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As...

CVE-2025-12390

CVE-2025-12390 affects Keycloak; it describes an offline session takeover where a user could receive another user’s tokens due to reusing session identifiers and incomplete logout cleanup when cookies are missing. Connected sources confirm this vulnerability in Keycloak and reference Red Hat advi...

CVE-2025-12390 Org.keycloak.protocol.oidc.endpoints.logoutendpoint: offline session takeover due to reused authentication session id

A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As...

CVE-2025-12390 Org.keycloak.protocol.oidc.endpoints.logoutendpoint: offline session takeover due to reused authentication session id

A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As...

CVE-2025-12390

A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As...

Duplicate Advisory: Keycloak allows access to admin path through flaw

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-j4vq-q93m-4683. This link is maintained to preserve external references. Original Description A flaw was found in Keycloak. The Keycloak guides recommend to not expose /admin path to the outside in case the...

GHSA-C6CM-5GC7-C3F4 Duplicate Advisory: Keycloak allows access to admin path through flaw

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-j4vq-q93m-4683. This link is maintained to preserve external references. Original Description A flaw was found in Keycloak. The Keycloak guides recommend to not expose /admin path to the outside in case the...

CVE-2025-10939

A flaw was found in Keycloak. The Keycloak guides recommend to not expose /admin path to the outside in case the installation is using a proxy. The issue occurs at least via ha-proxy, as it can be tricked to using relative/non-normalized paths to access the /admin application path relative to...

de.arbeitsagentur.opdt:keycloak-cassandra-model-tests (>=4.1.0-26.0 <=5.4.3-26.2), net.optionfactory.keycloak:optionfactory-keycloak-providers (>=8.1 <=8.9) +21 more potentially affected by CVE-2025-10939 via org.keycloak:keycloak-quarkus-server (>=26.0.0 <=26.3.5)

org.keycloak:keycloak-quarkus-server MAVEN version =26.0.0, =4.1.0-26.0, =8.1, =26.3.0, =26.1.0, =26.1.0, =26.1.0, =26.1.0, =26.1.0, =26.1.0, =26.1.0, =26.2.0, =26.2.0, =26.1.0, =26.1.0, =26.1.0, =26...

Uncontrolled Search Path Element

Overview Affected versions of this package are vulnerable to Uncontrolled Search Path Element via the /admin application path relative to /realms when accessed through a proxy that does not properly restrict or normalize URLs. An attacker can gain unauthorized access to sensitive administrative...

CVE-2025-10939 Org.keycloak/keycloak-quarkus-server: unable to restrict access to the admin console

A flaw was found in Keycloak. The Keycloak guides recommend to not expose /admin path to the outside in case the installation is using a proxy. The issue occurs at least via ha-proxy, as it can be tricked to using relative/non-normalized paths to access the /admin application path relative to...

CVE-2025-10939 Org.keycloak/keycloak-quarkus-server: unable to restrict access to the admin console

A flaw was found in Keycloak. The Keycloak guides recommend to not expose /admin path to the outside in case the installation is using a proxy. The issue occurs at least via ha-proxy, as it can be tricked to using relative/non-normalized paths to access the /admin application path relative to...