CVE-2026-4325
Keycloak: keycloak: replay of action tokens via improper handling of single-use entries
- Published
- Updated
- Reserved
- Assigned by
- redhat
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.
Timeline
ID reserved
By redhat
- 16 days later
· 16 days later
Published
- 5 days later
· 5 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| redhatCNA (assigner) | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |
| NVDNVD · Analyzed | 3.1 | Medium5.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.26% · top 83% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.
Weakness
Affected products
Red Hat · Red Hat build of Keycloak 26.2
- unaffected 26.2.15-1 – < *
Red Hat · Red Hat build of Keycloak 26.2
- unaffected 26.2-18 – < *
Red Hat · Red Hat build of Keycloak 26.2
- unaffected 26.2-18 – < *
Red Hat · Red Hat build of Keycloak 26.2.15
All versions: unaffected
Red Hat · Red Hat build of Keycloak 26.4
- unaffected 26.4.11-1 – < *
Red Hat · Red Hat build of Keycloak 26.4
- unaffected 26.4-14 – < *
Red Hat · Red Hat build of Keycloak 26.4
- unaffected 26.4-14 – < *
Red Hat · Red Hat build of Keycloak 26.4.11
All versions: unaffected
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenorg.keycloak:keycloak-servicesGHSA-rx66-hj7g-28h7 (opens in a new tab)
What to do
Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
References (6)
- RHSA-2026:6475 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:6476 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:6477 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- RHSA-2026:6478 (opens in a new tab)vendor-advisoryx_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-4325 (opens in a new tab)vdb-entryx_refsource_REDHAT
- RHBZ#2448351 (opens in a new tab)issue-trackingx_refsource_REDHAT
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-rx66-hj7g-28h7 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-4325)Record last updated .