CVE-2026-8922
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk20th percentile - higher than 20% of all known CVEs
Summary
A flaw was found in Keycloak where, when both realm-level and client-level `notBefore` revocation policies are configured, the OIDC Introspection feature fails to properly honor the realm-level policy. This allows tokens that should have been revoked to remain active, potentially leading to unauthorized access or continued session validity.
Risk Assessment
The risk involves potential unauthorized access to resources protected by Keycloak, as JWT tokens that should have been revoked at the realm level are still accepted. This could compromise the security of identity and access management systems.
Recommendation
It is recommended to immediately update Keycloak to a version that fixes this vulnerability. Until an update is applied, consider temporarily disabling `notBefore` policies at either the client or realm level if feasible.
Original NVD description (English source)
A flaw was found in Keycloak. When both realm-level and client-level `notBefore` revocation policies are configured, Keycloak's OpenID Connect (OIDC) Introspection feature fails to properly honor the realm-level policy. This allows tokens that should have been revoked to remain active, potentially leading to unauthorized access or continued session validity. This could impact the security of systems utilizing Keycloak for identity and access management.