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TI-2023-00087 Aliases CVE-2023-0091GHSA-v436-q368-hvgg

Incorrect authorization in Red Hat Keycloak

Priority LOW 19CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-863.

Summary

A flaw was found in Keycloak, where it did not properly check client tokens for possible revocation in its client credential flow. This flaw allows an attacker to access or modify potentially sensitive information.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00479 41st percentileScored 2026-11-07
Fix Fixed org.keycloak:keycloak-core (Maven): 20.0.3Red Hat: 5 advisories

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatKeycloak——Not affectedCNA
—org.keycloak:keycloak-core (Maven)before 20.0.320.0.3Patch availableGHSA-v436-q368-hvgg
  • Keycloak VendorRed Hat Affected — Fixed in — Not affected CNA
  • org.keycloak:keycloak-core (Maven) Vendor— Affected before 20.0.3 Fixed in 20.0.3 Patch available GHSA-v436-q368-hvgg

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:redhat:keycloak:-:*:*:*:*:*:*:*not specified by NVDVulnerableRed Hat
cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:*7.0Running onRed Hat
  • cpe:2.3:a:redhat:keycloak:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Red Hat
  • cpe:2.3:a:redhat:single_sign-on:7.0:*:*:*:*:*:*:* Versions 7.0 Running on ·Red Hat

Remediation

  • Fix · GHSA-v436-q368-hvgg org.keycloak:keycloak-core (Maven) Fixed in 20.0.3 Advisory →

Red Hat 5 advisories

  • RHSA-2023:1043 Released 2023-03-01 · Red Hat rating Important
    Red Hat Single Sign-On 7.6.2 security update on RHEL 7
    • Red Hat Single Sign-On 7.6 for RHEL 7 Server rh-sso7-keycloak-18.0.6-1.redhat_00001.1.el7sso, rh-sso7-keycloak-server-18.0.6-1.redhat_00001.1.el7sso
  • RHSA-2023:1049 Released 2023-03-01 · Red Hat rating Important
    Red Hat Single Sign-On 7.6.2 security update
    • Red Hat Single Sign-On 7
  • RHSA-2023:1047 Released 2023-03-01 · Red Hat rating Important
    Red Hat Single Sign-On 7.6.2 for OpenShift image security and enhancement update
    • Middleware Containers for OpenShift rh-sso-7/sso76-openshift-rhel8
Show 2 more Red Hat advisories
  • RHSA-2023:1045 Released 2023-03-01 · Red Hat rating Important
    Red Hat Single Sign-On 7.6.2 security update on RHEL 9
    • Red Hat Single Sign-On 7.6 for RHEL 9 rh-sso7-keycloak-18.0.6-1.redhat_00001.1.el9sso, rh-sso7-keycloak-server-18.0.6-1.redhat_00001.1.el9sso
  • RHSA-2023:1044 Released 2023-03-01 · Red Hat rating Important
    Red Hat Single Sign-On 7.6.2 security update on RHEL 8
    • Red Hat Single Sign-On 7.6 for RHEL 8 rh-sso7-keycloak-18.0.6-1.redhat_00001.1.el8sso, rh-sso7-keycloak-server-18.0.6-1.redhat_00001.1.el8sso

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Middleware Containers for OpenShiftFixed RHSA-2023:1047
Red Hat Single Sign-On 7Fixed RHSA-2023:1049
Red Hat Single Sign-On 7.6 for RHEL 7 ServerFixed RHSA-2023:1043
Red Hat Single Sign-On 7.6 for RHEL 8Fixed RHSA-2023:1044
Red Hat Single Sign-On 7.6 for RHEL 9Fixed RHSA-2023:1045

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-0091
  2. 2026-10-03 Alias added: GHSA-v436-q368-hvgg

References

Advisory 2

Other 2

  • TI-2024-01049 Keycloak: path transversal in redirection validation CVSS 3.1HIGH 8.1
  • TI-2023-26623 The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6… CVSS 3.1MEDIUM 5.9
  • TI-2020-08665 Server-side request forgery in keycloak CVSS 3.1MEDIUM 5.3
  • TI-2022-03468 Path traversal in Red Hat Keycloak CVSS 3.1CRITICAL 9.1
  • TI-2021-03612 A POST based reflected Cross Site Scripting vulnerability on has been identified in Keycloak. CVSS 3.1MEDIUM 6.1
  • TI-2022-03994 Cross-site scripting in keycloak CVSS 3.1CRITICAL 10.0
See all 97 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences