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Vulnerabilities

Vulnerability · CVE-2023-6291

A flaw was found in the redirect_uri validation logic in Keycloak.

Published Jan 26, 2024 · catalog updated Nov 4, 2026 · A flaw was found

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-2023-6291. EPSS is 0.95%. Act only if a listed version of A flaw was found is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (A flaw was found).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.95%
Remediation
Version ranges on file
Affected products
cpe redhat/keycloak · cpe redhat/openshift container platform · cpe redhat/openshift container platform for ibm z · cpe redhat/openshift container platform for linuxone · cpe redhat/openshift container platform for power

A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.

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 ibm z4.10
  • cpe redhat/openshift container platform for ibm z4.9
  • cpe redhat/openshift container platform for linuxone4.10
  • cpe redhat/openshift container platform for linuxone4.9
  • cpe redhat/openshift container platform for power4.9

How to fix CVE-2023-6291

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-2023-6291. EPSS is 0.95%. Act only if a listed version of A flaw was found 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 ibm z 4.10; redhat/openshift container platform for ibm z 4.9. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-601: URL Redirection to Untrusted Site (Open Redirect). EPSS 0.95%. 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. Jan 26, 2024 · Monitored products — high

    Detected

    A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.

  2. Sep 22, 2026 · Monitored products — high

    Updated

    A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.

  3. Nov 4, 2026 · NIST NVD

    Updated

    A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.

Sources

  • CVE.orgVulnerability recordCVE-2023-6291

    Official CVE identifier

    cve.org
  • Monitored products — highVendor advisoryCVE-2023-6291

    A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.

    nvd.nist.gov
  • NIST NVDVulnerability recordCVE-2023-6291

    A flaw was found in the redirect_uri validation logic in Keycloak. This issue may allow a bypass of otherwise explicitly allowed hosts. A successful attack may lead to an access token being stolen, making it possible for the attacker to impersonate other users.

    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.

  • NIST NVDNov 5, 2026
  • CVE.orgNov 4, 2026
  • Monitored products — highNov 3, 2026