Description
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.
Affected products
redhat: build of keycloak
References6
- access.redhat.com/errata/RHSA-2026:6475 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:6476 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:6477 Vendor Advisory
- access.redhat.com/errata/RHSA-2026:6478 Vendor Advisory
- access.redhat.com/security/cve/CVE-2026-4325 Vendor Advisory
- bugzilla.redhat.com/show_bug.cgi?id=2448351 Issue TrackingVendor Advisory
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N - EPSS — exploit probability
- 0% percentile: 17 · as of 12 November 2026
- CWE
- CWE-653
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.