Description (CNA)
A flaw was found in Keycloak. When the configuration uses JWT tokens for authentication, the tokens are cached until expiration. If a client uses JWT tokens with an excessively long expiration time, for example, 24 or 48 hours, the cache can grow indefinitely, leading to an OutOfMemoryError. This issue could result in a denial of service condition, preventing legitimate users from accessing the system.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Not supplied / Not supplied | affected 23.0.0 before 26.0.11; affected 26.1.0 before 26.1.5 |
| Red Hat / Red Hat Build of Keycloak | unaffected |
| Red Hat / Red Hat build of Keycloak 26.0 | unaffected 26.0.11-2 before * |
| Red Hat / Red Hat build of Keycloak 26.0 | unaffected 26.0-12 before * |
| Red Hat / Red Hat build of Keycloak 26.0 | unaffected 26.0-13 before * |
| Red Hat / Red Hat Single Sign-On 7 | affected |
CWE
CWE-770
References
- https://access.redhat.com/errata/RHSA-2025:4335
- https://access.redhat.com/errata/RHSA-2025:4336
- https://access.redhat.com/security/cve/CVE-2025-2559
- https://bugzilla.redhat.com/show_bug.cgi?id=2353868
- https://github.com/keycloak/keycloak/commit/a10c8119d4452b866b90a9019b2cc159919276ca
- https://github.com/keycloak/keycloak/issues/38576
ADP enrichment
No English description supplied.
No references supplied.