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7.5 High

CVE-2024-4540 A flaw was found in Keycloak in OAuth 2.0 Pushed Authorization Requests (PAR)

Description

A flaw was found in Keycloak in OAuth 2.0 Pushed Authorization Requests (PAR). Client-provided parameters were found to be included in plain text in the KC_RESTART cookie returned by the authorization server's HTTP response to a `request_uri` authorization request, possibly leading to an information disclosure vulnerability.

Affected products and versions

Product Affected versions Fixed in
Red Hat Build of Keycloak Versions not published
Red Hat build of Keycloak 22 22 earliest → < 22-18 22-18
Red Hat build of Keycloak 24 24 earliest → < 24-10 24-10
Red Hat Single Sign-On 7 Versions not published
Red Hat Single Sign-On 7.6 for RHEL 7 Versions not published
Red Hat Single Sign-On 7.6 for RHEL 8 Versions not published
Red Hat Single Sign-On 7.6 for RHEL 9 Versions not published
RHEL-8 based Middleware Containers 7.6 earliest → < 7.6-49 7.6-49
Red Hat Single Sign-On 7.0 Versions not published

References

Timeline

  1. Published
  2. Last modified

Other CVEs of Red Hat Build of Keycloak

The 266 CVEs of Red Hat Build of Keycloak →
CVE-2026-97847 Keycloak-services: keycloak-services: client manager can substitute sessionless token principal via hardcoded-claim mappers to obtain realm administrator authority 7.1 High CVE-2026-97175 Keycloak-services: keycloak-services: unverified idp email auto-linking enables account takeover 8.8 High CVE-2026-97174 Keycloak-services: keycloak-services: ciba sub parameter injection causes attacker authentication to issue victim tokens 6.8 Medium CVE-2026-96453 Org.keycloak/keycloak-admin-cli: keycloak-admin-cli: kcadm custom truststore accepts arbitrary self-signed certificates 8.0 High
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