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...

org.keycloak:keycloak-authz-policy-drools (2.5.0.cr1), org.keycloak:keycloak-dependencies-server-all (2.5.0.cr1) +5 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (2.5.0.cr1)

org.keycloak:keycloak-services MAVEN version 2.5.0.cr1 is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.keycloak:keycloak-authz-policy-drools 2.5.0.cr1 -...

org.keycloak:keycloak-authz-policy-common (10.0.0), org.keycloak:keycloak-dependencies-server-all (10.0.0) +12 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-server-spi-private (10.0.0)

org.keycloak:keycloak-server-spi-private MAVEN version 10.0.0 is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-server-spi-private and may be impacted: - org.keycloak:keycloak-authz-policy-common 10.0.0 -...

org.keycloak:keycloak-authz-policy-drools (2.1.0.cr1), org.keycloak:keycloak-dependencies-server-all (2.1.0.cr1) +3 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (2.1.0.cr1)

org.keycloak:keycloak-services MAVEN version 2.1.0.cr1 is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.keycloak:keycloak-authz-policy-drools 2.1.0.cr1 -...

org.keycloak:keycloak-account-freemarker (1.0-alpha-4), org.keycloak:keycloak-login-freemarker (1.0-alpha-4) +1 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (1.0-alpha-4)

org.keycloak:keycloak-services MAVEN version 1.0-alpha-4 is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.keycloak:keycloak-account-freemarker 1.0-alpha-4 - org.keycloak:keycloak-login-freemarker...

org.keycloak:keycloak-dependencies-server-min (4.2.1.final), org.keycloak:keycloak-model-jpa (4.2.1.final) +2 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (4.2.1.final)

org.keycloak:keycloak-services MAVEN version 4.2.1.final is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.keycloak:keycloak-dependencies-server-min 4.2.1.final - org.keycloak:keycloak-model-jpa...

io.phasetwo.keycloak:keycloak-events (>=0.18, <=0.19), io.phasetwo.keycloak:keycloak-magic-link (>=0.16, <=0.19) +56 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-server-spi-private (22.0.0)

org.keycloak:keycloak-server-spi-private MAVEN version 22.0.0 is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-server-spi-private and may be impacted: - io.phasetwo.keycloak:keycloak-events =0.18, =0.16, =0.37, =0.9, =1.6, =2.1 -...

org.jboss.aerogear.unifiedpush:unifiedpush-auth-server (1.0.1), org.keycloak:keycloak-account-freemarker (1.0-final) +4 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (1.0-final)

org.keycloak:keycloak-services MAVEN version 1.0-final is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.jboss.aerogear.unifiedpush:unifiedpush-auth-server 1.0.1 -...

org.keycloak:keycloak-account-freemarker (1.6.1.final), org.keycloak:keycloak-broker-oidc (1.6.1.final) +9 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (1.6.1.final)

org.keycloak:keycloak-services MAVEN version 1.6.1.final is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.keycloak:keycloak-account-freemarker 1.6.1.final - org.keycloak:keycloak-broker-oidc...

org.jboss.aerogear.unifiedpush:unifiedpush-auth-server (>=1.1.0-beta.3, <=1.1.3.final), org.keycloak:keycloak-account-freemarker (1.3.1.final) +9 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (1.3.1.final)

org.keycloak:keycloak-services MAVEN version 1.3.1.final is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.jboss.aerogear.unifiedpush:unifiedpush-auth-server =1.1.0-beta.3, =1.1.3.final -...

org.jboss.aerogear.unifiedpush:unifiedpush-auth-server (1.1.0-beta.2), org.keycloak:keycloak-account-freemarker (1.2.0.final) +9 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (1.2.0.final)

org.keycloak:keycloak-services MAVEN version 1.2.0.final is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.jboss.aerogear.unifiedpush:unifiedpush-auth-server 1.1.0-beta.2 -...

org.keycloak:keycloak-account-freemarker (1.3.0.final), org.keycloak:keycloak-broker-oidc (1.3.0.final) +10 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (1.3.0.final)

org.keycloak:keycloak-services MAVEN version 1.3.0.final is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.keycloak:keycloak-account-freemarker 1.3.0.final - org.keycloak:keycloak-broker-oidc...

org.keycloak:keycloak-account-freemarker (1.4.0.final), org.keycloak:keycloak-broker-oidc (1.4.0.final) +8 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (1.4.0.final)

org.keycloak:keycloak-services MAVEN version 1.4.0.final is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.keycloak:keycloak-account-freemarker 1.4.0.final - org.keycloak:keycloak-broker-oidc...

org.keycloak:keycloak-account-freemarker (1.6.0.final), org.keycloak:keycloak-broker-oidc (1.6.0.final) +9 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (1.6.0.final)

org.keycloak:keycloak-services MAVEN version 1.6.0.final is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.keycloak:keycloak-account-freemarker 1.6.0.final - org.keycloak:keycloak-broker-oidc...

de.arbeitsagentur.opdt:keycloak-cassandra-extension (>=2.5.3-23.0, <=2.5.5-23.0), de.arbeitsagentur.opdt:keycloak-cassandra-model-tests (>=2.5.3-23.0, <=2.5.5-23.0) +66 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-server-spi-private (23.0.7)

org.keycloak:keycloak-server-spi-private MAVEN version 23.0.7 is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-server-spi-private and may be impacted: - de.arbeitsagentur.opdt:keycloak-cassandra-extension =2.5.3-23.0, =2.5.3-23.0,...

org.keycloak:keycloak-account-freemarker (1.2.0.cr1), org.keycloak:keycloak-broker-oidc (1.2.0.cr1) +8 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (1.2.0.cr1)

org.keycloak:keycloak-services MAVEN version 1.2.0.cr1 is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.keycloak:keycloak-account-freemarker 1.2.0.cr1 - org.keycloak:keycloak-broker-oidc 1.2.0.cr...

org.keycloak:keycloak-account-freemarker (1.5.1.final), org.keycloak:keycloak-broker-oidc (1.5.1.final) +8 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (1.5.1.final)

org.keycloak:keycloak-services MAVEN version 1.5.1.final is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.keycloak:keycloak-account-freemarker 1.5.1.final - org.keycloak:keycloak-broker-oidc...

org.keycloak:keycloak-account-freemarker (1.7.0.cr1), org.keycloak:keycloak-broker-oidc (1.7.0.cr1) +9 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (1.7.0.cr1)

org.keycloak:keycloak-services MAVEN version 1.7.0.cr1 is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.keycloak:keycloak-account-freemarker 1.7.0.cr1 - org.keycloak:keycloak-broker-oidc 1.7.0.cr...

org.jboss.aerogear.unifiedpush:unifiedpush-auth-server (>=1.2.0-alpha.1, <=1.2.0-beta.1), org.keycloak:keycloak-account-freemarker (1.7.0.final) +10 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-services (1.7.0.final)

org.keycloak:keycloak-services MAVEN version 1.7.0.final is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-services and may be impacted: - org.jboss.aerogear.unifiedpush:unifiedpush-auth-server =1.2.0-alpha.1, =1.2.0-beta.1 -...

de.adorsys.multibanking:keycloak-custom-secret-provider (>=1.3.0, <=1.20), org.keycloak:keycloak-authz-policy-common (3.1.0.final) +12 more potentially affected by CVE-2026-9704 via org.keycloak:keycloak-server-spi-private (3.1.0.final)

org.keycloak:keycloak-server-spi-private MAVEN version 3.1.0.final is affected by a known vulnerability. The following packages have a transitive dependency on org.keycloak:keycloak-server-spi-private and may be impacted: - de.adorsys.multibanking:keycloak-custom-secret-provider =1.3.0, =1.20 -...