Read the docs
TI-2023-05996 Aliases CVE-2023-6544GHSA-46c8-635v-68r2

Keycloak: authorization bypass

Priority LOW 27CWE-625Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

A flaw was found in the Keycloak package. This issue occurs due to a permissive regular expression hardcoded for filtering which allows hosts to register a dynamic client. A malicious user with enough information about the environment could jeopardize an environment with this specific Dynamic Client Registration and TrustedDomain configuration previously unauthorized.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01075 65th percentileScored 2026-11-07
Fix Fixed org.keycloak:keycloak-services: 22.0.10, 24.0.3org.keycloak:keycloak-services (Maven): 22.0.10, 24.0.3Red Hat: 7 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
—org.keycloak:keycloak-services22.0.0 to before 22.0.10; 23.0.0 to before 24.0.322.0.10, 24.0.3Patch availableCNA
Red HatRed Hat build of Keycloak 22—22.0.10-1Patch availableCNA
Red HatRed Hat build of Keycloak 22—22-13Patch availableCNA
Red HatRed Hat build of Keycloak 22—22-16Patch availableCNA
Red HatRed Hat build of Keycloak 22.0.10——Not affectedCNA
Red HatRed Hat Single Sign-On 7.6 for RHEL 7—18.0.13-1.redhat_00001.1.el7ssoPatch availableCNA
Red HatRed Hat Single Sign-On 7.6 for RHEL 8—18.0.13-1.redhat_00001.1.el8ssoPatch availableCNA
Red HatRed Hat Single Sign-On 7.6 for RHEL 9—18.0.13-1.redhat_00001.1.el9ssoPatch availableCNA
Red HatRHEL-8 based Middleware Containers—7.6-46Patch availableCNA
Red HatRHSSO 7.6.8——Not affectedCNA
—org.keycloak:keycloak-services (Maven)before 22.0.1022.0.10Patch availableGHSA-46c8-635v-68r2
—org.keycloak:keycloak-services (Maven)23.0.0 to before 24.0.324.0.3Patch availableGHSA-46c8-635v-68r2
  • org.keycloak:keycloak-services Vendor— Affected 22.0.0 to before 22.0.10; 23.0.0 to before 24.0.3 Fixed in 22.0.10, 24.0.3 Patch available CNA
  • Red Hat build of Keycloak 22 VendorRed Hat Affected — Fixed in 22.0.10-1 Patch available CNA
  • Red Hat build of Keycloak 22 VendorRed Hat Affected — Fixed in 22-13 Patch available CNA
  • Red Hat build of Keycloak 22 VendorRed Hat Affected — Fixed in 22-16 Patch available CNA
  • Red Hat build of Keycloak 22.0.10 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat Single Sign-On 7.6 for RHEL 7 VendorRed Hat Affected — Fixed in 18.0.13-1.redhat_00001.1.el7sso Patch available CNA
  • Red Hat Single Sign-On 7.6 for RHEL 8 VendorRed Hat Affected — Fixed in 18.0.13-1.redhat_00001.1.el8sso Patch available CNA
  • Red Hat Single Sign-On 7.6 for RHEL 9 VendorRed Hat Affected — Fixed in 18.0.13-1.redhat_00001.1.el9sso Patch available CNA
  • RHEL-8 based Middleware Containers VendorRed Hat Affected — Fixed in 7.6-46 Patch available CNA
  • RHSSO 7.6.8 VendorRed Hat Affected — Fixed in — Not affected CNA
  • org.keycloak:keycloak-services (Maven) Vendor— Affected before 22.0.10 Fixed in 22.0.10 Patch available GHSA-46c8-635v-68r2
  • org.keycloak:keycloak-services (Maven) Vendor— Affected 23.0.0 to before 24.0.3 Fixed in 24.0.3 Patch available GHSA-46c8-635v-68r2

CPE names CNA · 7

CPEVersionsRoleVendor
cpe:/a:redhat:build_keycloak:22::el922—Red Hat
cpe:/a:redhat:build_keycloak:2222—Red Hat
cpe:/a:redhat:red_hat_single_sign_on:7.6::el77.6—Red Hat
cpe:/a:redhat:red_hat_single_sign_on:7.6::el87.6—Red Hat
cpe:/a:redhat:red_hat_single_sign_on:7.6::el97.6—Red Hat
cpe:/a:redhat:rhosemc:1.0::el81.0—Red Hat
cpe:/a:redhat:red_hat_single_sign_on:7.67.6—Red Hat
  • cpe:/a:redhat:build_keycloak:22::el9 Versions 22 — ·Red Hat
  • cpe:/a:redhat:build_keycloak:22 Versions 22 — ·Red Hat
  • cpe:/a:redhat:red_hat_single_sign_on:7.6::el7 Versions 7.6 — ·Red Hat
  • cpe:/a:redhat:red_hat_single_sign_on:7.6::el8 Versions 7.6 — ·Red Hat
  • cpe:/a:redhat:red_hat_single_sign_on:7.6::el9 Versions 7.6 — ·Red Hat
  • cpe:/a:redhat:rhosemc:1.0::el8 Versions 1.0 — ·Red Hat
  • cpe:/a:redhat:red_hat_single_sign_on:7.6 Versions 7.6 — ·Red Hat

Remediation

  • Fix · CNA org.keycloak:keycloak-services Fixed in 22.0.10, 24.0.3
  • Fix · GHSA-46c8-635v-68r2 org.keycloak:keycloak-services (Maven) Fixed in 22.0.10 Advisory →
  • Fix · GHSA-46c8-635v-68r2 org.keycloak:keycloak-services (Maven) Fixed in 24.0.3 Advisory →

Red Hat 7 advisories

  • RHSA-2024:1867 Released 2024-04-16 · Red Hat rating Moderate
    Red Hat build of Keycloak 22.0.10 enhancement and security update
    • Red Hat build of Keycloak 22 rhbk/keycloak-operator-bundle, rhbk/keycloak-rhel9, rhbk/keycloak-rhel9-operator
  • RHSA-2024:1868 Released 2024-04-16 · Red Hat rating Important
    Red Hat build of Keycloak security update
    • Red Hat build of Keycloak 22.0.10
  • RHSA-2024:1866 Released 2024-04-16 · Red Hat rating Important
    Red Hat Single Sign-On 7.6.8 security update
    • RHSSO 7.6.8
Show 4 more Red Hat advisories
  • RHSA-2024:1862 Released 2024-04-16 · Red Hat rating Important
    Red Hat Single Sign-On 7.6.8 security update on RHEL 9
    • Red Hat Single Sign-On 7.6 for RHEL 9 rh-sso7-keycloak-18.0.13-1.redhat_00001.1.el9sso, rh-sso7-keycloak-server-18.0.13-1.redhat_00001.1.el9sso
  • RHSA-2024:1861 Released 2024-04-16 · Red Hat rating Important
    Red Hat Single Sign-On 7.6.8 security update on RHEL 8
    • Red Hat Single Sign-On 7.6 for RHEL 8 rh-sso7-keycloak-18.0.13-1.redhat_00001.1.el8sso, rh-sso7-keycloak-server-18.0.13-1.redhat_00001.1.el8sso
  • RHSA-2024:1860 Released 2024-04-16 · Red Hat rating Important
    Red Hat Single Sign-On 7.6.8 enhancement and security update on RHEL 7
    • Red Hat Single Sign-On 7.6 for RHEL 7 Server rh-sso7-keycloak-18.0.13-1.redhat_00001.1.el7sso, rh-sso7-keycloak-server-18.0.13-1.redhat_00001.1.el7sso
  • RHSA-2024:1864 Released 2024-04-16 · Red Hat rating Important
    Red Hat Single Sign-On 7.6.8 for OpenShift image enhancement and security update
    • Middleware Containers for OpenShift rh-sso-7/sso76-openshift-rhel8

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Middleware Containers for OpenShiftFixed RHSA-2024:1864
RHSSO 7.6.8Fixed RHSA-2024:1866
Red Hat Single Sign-On 7.6 for RHEL 7 ServerFixed RHSA-2024:1860
Red Hat Single Sign-On 7.6 for RHEL 8Fixed RHSA-2024:1861
Red Hat Single Sign-On 7.6 for RHEL 9Fixed RHSA-2024:1862
Red Hat build of Keycloak 22Fixed RHSA-2024:1867
Red Hat build of Keycloak 22.0.10Fixed RHSA-2024:1868

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-6544
  2. 2026-10-03 Alias added: GHSA-46c8-635v-68r2

References

Advisory 8

Other 4

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7413 →

Sources

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