CVE-2023-2422

Name: CVE-2023-2422
Creator: NVD / NIST
Published: 2023-10-04T11:15:10.157+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.1/10EPSS 0.43%

Last modified Jun 17, 2026

CVE-2023-2422 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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. EPSS estimates a 0.43% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.1/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

EPSS Probability

0.43%

34.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Redhat	Keycloak	All versions
Redhat	Openshift Container Platform	4.9
Redhat	Openshift Container Platform	4.10
Redhat	Openshift Container Platform	4.11
Redhat	Openshift Container Platform	4.12
Redhat	Single Sign-On	7.6

References

https://access.redhat.com/errata/RHSA-2023:3883Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3884Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3885Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3888Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3892Vendor Advisory
https://access.redhat.com/security/cve/CVE-2023-2422Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2191668Issue Tracking, Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3883Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3884Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3885Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3888Vendor Advisory
https://access.redhat.com/errata/RHSA-2023:3892Vendor Advisory
https://access.redhat.com/security/cve/CVE-2023-2422Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2191668Issue Tracking, Vendor Advisory

Timeline

Published: Oct 4, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-2422?

How severe is CVE-2023-2422?

CVE-2023-2422 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.43% probability of exploitation in the next 30 days.

How do I fix CVE-2023-2422?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-2422?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST