CVE-2023-2422
Keycloak: oauth client impersonation
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
A flaw was found in Keycloak. A Keycloak server configured to support mTLS authentication for OAuth/OpenID clients does not properly verify the client certificate chain. A client that possesses a proper certificate can authorize itself as any other client, therefore, access data that belongs to other clients.
Timeline
ID reserved
By redhat
- 5 months later
· 5 months later
Published
- 10 months later
· 10 months 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 | Medium5.5 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N |
| NVDNVD · Modified | 3.1 | High7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.52% · top 55% 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 5.5.
Weakness
Affected products
Red Hat · Red Hat Single Sign-On 7
All versions: unaffected
Red Hat · Red Hat Single Sign-On 7.6 for RHEL 7
- unaffected 0:18.0.8-1.redhat_00001.1.el7sso – < *
Red Hat · Red Hat Single Sign-On 7.6 for RHEL 8
- unaffected 0:18.0.8-1.redhat_00001.1.el8sso – < *
Red Hat · Red Hat Single Sign-On 7.6 for RHEL 9
- unaffected 0:18.0.8-1.redhat_00001.1.el9sso – < *
Red Hat · RHEL-8 based Middleware Containers
- unaffected 7.6-24 – < *
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Mavenorg.keycloak:keycloak-servicesGHSA-3qh5-qqj2-c78f (opens in a new tab)
References (7)
- RHSA-2023:3883 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2023:3884 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2023:3885 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2023:3888 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- RHSA-2023:3892 (opens in a new tab)vendor-advisoryx_refsource_REDHATx_transferred
- https://access.redhat.com/security/cve/CVE-2023-2422 (opens in a new tab)vdb-entryx_refsource_REDHATx_transferred
- RHBZ#2191668 (opens in a new tab)issue-trackingx_refsource_REDHATx_transferred
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-3qh5-qqj2-c78f (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-2023-2422)Record last updated .