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Vulnerabilities

Vulnerability · CVE-2023-6134

CVE-2023-6134 is listed by A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token..

Published Dec 14, 2023 · catalog updated Sep 22, 2026 · single sign-on

Last checked Nov 6, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2023-6134. EPSS is 1.32%. Act only if a listed version of single sign-on is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Medium5.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.32%
Remediation
Version ranges on file
Affected products
cpe redhat/keycloak · cpe redhat/openshift container platform · cpe redhat/openshift container platform for power · cpe redhat/single sign-on

CVE-2023-6134 is listed by A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token..

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe redhat/keycloak< 22.0.7
  • cpe redhat/openshift container platform4.11
  • cpe redhat/openshift container platform4.12
  • cpe redhat/openshift container platform for power4.10
  • cpe redhat/openshift container platform for power4.9
  • cpe redhat/single sign-on< 7.6

How to fix CVE-2023-6134

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2023-6134. EPSS is 1.32%. Act only if a listed version of single sign-on is installed.

Which versions are affected?

Compare what you have installed with redhat/openshift container platform 4.11; redhat/openshift container platform 4.12; redhat/openshift container platform for power 4.10; redhat/openshift container platform for power 4.9. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-79: Cross-site Scripting (XSS). EPSS 1.32%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Keycloak security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Dec 14, 2023 · Monitored products — high

    Detected

    CVE-2023-6134 is listed by A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token..

  2. Sep 22, 2026 · Monitored products — high

    Updated

    CVE-2023-6134 is listed by A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token..

Sources

  • CVE.orgVulnerability recordCVE-2023-6134

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2023-6134

    A flaw was found in Keycloak that prevents certain schemes in redirects, but permits them if a wildcard is appended to the token. This issue could allow an attacker to submit a specially crafted request leading to cross-site scripting (XSS) or further attacks. This flaw is the result of an incomplete fix for CVE-2020-10748.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 6, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • Monitored products — highNov 3, 2026