CVE-2026-4325: Keycloak: Replay of action tokens via improper handling of single-use entries
(updated )
A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an attacker to delete arbitrary single-use entries, which can enable the replay of consumed action tokens, such as password reset links. This could lead to unauthorized access or account compromise.
References
- access.redhat.com/errata/RHSA-2026:6475
- access.redhat.com/errata/RHSA-2026:6476
- access.redhat.com/errata/RHSA-2026:6477
- access.redhat.com/errata/RHSA-2026:6478
- access.redhat.com/security/cve/CVE-2026-4325
- bugzilla.redhat.com/show_bug.cgi?id=2448351
- github.com/advisories/GHSA-rx66-hj7g-28h7
- github.com/keycloak/keycloak
- github.com/keycloak/keycloak/commit/9046f201125a6fd6be9c116b99d348509d99d4a5
- github.com/keycloak/keycloak/issues/47715
- nvd.nist.gov/vuln/detail/CVE-2026-4325
Code Behaviors & Features
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