CVE-2023-6544

CVE.org · Published

Record status: Published
Identifier year (not publication year): 2023
Source publication: Apr 25, 2024
Source updated: Nov 11, 2025
Imported by cveboard: Oct 24, 2026
Source snapshot: cve_2026-10-24_midnight_baseline · Oct 24, 2026

CNA source text (English)

Keycloak: authorization bypass

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.

Scoped product and version facts

Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.

Exploitation unknown; this catalogue does not assess exploitation.

org.keycloak:keycloak-services

Vendor: Unknown
Product: Unknown
Platforms: Unknown
Default status: unaffected
Package: org.keycloak:keycloak-services
Package collection: https://github.com/keycloak/keycloak

org.keycloak:keycloak-services · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
22.0.0	`affected`	semver	22.0.10	Unavailable	None listed
23.0.0	`affected`	semver	24.0.3	Unavailable	None listed

Red Hat build of Keycloak 22

Vendor: Red Hat
Product: Red Hat build of Keycloak 22
Platforms: Unknown
Default status: affected
Package: rhbk/keycloak-operator-bundle
Package collection: https://catalog.redhat.com/software/containers/

Red Hat build of Keycloak 22 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
22.0.10-1	`unaffected`	rpm	*	Unavailable	None listed

Red Hat build of Keycloak 22

Vendor: Red Hat
Product: Red Hat build of Keycloak 22
Platforms: Unknown
Default status: affected
Package: rhbk/keycloak-rhel9
Package collection: https://catalog.redhat.com/software/containers/

Red Hat build of Keycloak 22 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
22-13	`unaffected`	rpm	*	Unavailable	None listed

Red Hat build of Keycloak 22

Vendor: Red Hat
Product: Red Hat build of Keycloak 22
Platforms: Unknown
Default status: affected
Package: rhbk/keycloak-rhel9-operator
Package collection: https://catalog.redhat.com/software/containers/

Red Hat build of Keycloak 22 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
22-16	`unaffected`	rpm	*	Unavailable	None listed

Red Hat build of Keycloak 22.0.10

Vendor: Red Hat
Product: Red Hat build of Keycloak 22.0.10
Platforms: Unknown
Default status: unaffected
Package: keycloak-core
Package collection: https://access.redhat.com/downloads/content/package-browser/

No explicit version tuples; consult this entry's default status.

Red Hat Single Sign-On 7.6 for RHEL 7

Vendor: Red Hat
Product: Red Hat Single Sign-On 7.6 for RHEL 7
Platforms: Unknown
Default status: affected
Package: rh-sso7-keycloak
Package collection: https://access.redhat.com/downloads/content/package-browser/

Red Hat Single Sign-On 7.6 for RHEL 7 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
0:18.0.13-1.redhat_00001.1.el7sso	`unaffected`	rpm	*	Unavailable	None listed

Red Hat Single Sign-On 7.6 for RHEL 8

Vendor: Red Hat
Product: Red Hat Single Sign-On 7.6 for RHEL 8
Platforms: Unknown
Default status: affected
Package: rh-sso7-keycloak
Package collection: https://access.redhat.com/downloads/content/package-browser/

Red Hat Single Sign-On 7.6 for RHEL 8 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
0:18.0.13-1.redhat_00001.1.el8sso	`unaffected`	rpm	*	Unavailable	None listed

Red Hat Single Sign-On 7.6 for RHEL 9

Vendor: Red Hat
Product: Red Hat Single Sign-On 7.6 for RHEL 9
Platforms: Unknown
Default status: affected
Package: rh-sso7-keycloak
Package collection: https://access.redhat.com/downloads/content/package-browser/

Red Hat Single Sign-On 7.6 for RHEL 9 · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
0:18.0.13-1.redhat_00001.1.el9sso	`unaffected`	rpm	*	Unavailable	None listed

RHEL-8 based Middleware Containers

Vendor: Red Hat
Product: RHEL-8 based Middleware Containers
Platforms: Unknown
Default status: affected
Package: rh-sso-7/sso76-openshift-rhel8
Package collection: https://catalog.redhat.com/software/containers/

RHEL-8 based Middleware Containers · Scoped product and version facts
Version (version)	Status (status)	Version scheme (versionType)	Exclusive end (lessThan)	Inclusive end (lessThanOrEqual)	Status changes (at → status)
7.6-46	`unaffected`	rpm	*	Unavailable	None listed

RHSSO 7.6.8

Vendor: Red Hat
Product: RHSSO 7.6.8
Platforms: Unknown
Default status: unaffected
Package: rh-sso7-keycloak
Package collection: https://access.redhat.com/downloads/content/package-browser/

No explicit version tuples; consult this entry's default status.