CVE-2026-4325
Keycloak: Replay of action tokens via improper handling of single-use entries
5.3
MEDIUM
CVSS 3.1
EPSS 0.04%
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.
How to fix CVE-2026-4325
To remediate CVE-2026-4325, upgrade the affected package to a fixed version below.
- —upgrade to 26.5.7 or later
Is CVE-2026-4325 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 26.5.7
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |