Medium severity · published Apr 2, 2026
CVE-2026-4325
Keycloak: keycloak: replay of action tokens via improper handling of single-use entries
5.3
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat build of Keycloak 26.2 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat build of Keycloak 26.4 · Red Hat
All versions, or not specified · source: vendor
BO
Build OF Keycloak · Redhat
26.2; 26.2.15; 26.4; 26.4.11 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-4325
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-4325
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:6475
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:6476
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:6477
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:6478
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-4325
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2448351
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