CVE-2026-4325 Keycloak: keycloak: replay of action tokens via improper handling of single-use entries
Attackers can replay consumed action tokens like password reset links by deleting single-use entries, leading to unauthorized account access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-4325?
CVE-2026-4325 is a medium-severity vulnerability in Redhat Build of Keycloak, published on 2 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-653
Which versions are affected by CVE-2026-4325?
3 open source packages ship an affected version, including org.keycloak:keycloak-services and keycloak. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.keycloak:keycloak-services Maven | All versions | 26.5.7 |
org.keycloak:keycloak-services Maven | All versions | 26.5.7 |
keycloak Bitnami | From 26.2.0 | 26.2.1, 26.3.0, 26.4.1, 26.5.0 |
Products include Redhat Build of Keycloak.
How do I fix CVE-2026-4325?
Upgrade org.keycloak:keycloak-services to 26.5.7 or later.
Is CVE-2026-4325 being exploited?
There is no known exploitation of CVE-2026-4325 in the wild and no public exploit code.
Other vulnerabilities in Redhat Build of Keycloak
- CVE-2026-15572 Keycloak-services: keycloak-services: dcr protocol mapper type-swap policy bypass allows privilege escalation
- CVE-2026-3047 Keycloak SAML Broken has Authentication Bypass by Primary Weakness
- CVE-2026-15573 Keycloak-services: keycloak-services: authorization bypass via unnormalized uri matching in pathmatcher
- CVE-2026-16102 Keycloak-services: keycloak-services: default dcr policy allows role forgery via user property mappers
- CVE-2026-1609 Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users
Sources
Also known as BIT-keycloak-2026-4325, ECHO-5364-0e4b-b4fd, GHSA-rx66-hj7g-28h7, MINI-4wr7-pqcx-g9r6, MINI-pw88-v49h-49ph.