{"id":"CVE-2024-4540","title":"A flaw was found in Keycloak in OAuth 2.0 Pushed Authorization Requests (PAR)","summary":"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…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-312"],"published":"2024-06-03","updated":"2026-10-09","sourceUpdated":"2026-10-09T17:16:39.943","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2024-4540","references":[{"url":"https://access.redhat.com/errata/RHSA-2024:3566","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:3567","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:3568","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:3570","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:3572","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:3573","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:3574","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:3575","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:3576","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2024-4540","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2279303","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/errata/RHSA-2024:3566","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:3567","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:3568","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:3570","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:3572","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:3573","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:3574","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:3575","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/errata/RHSA-2024:3576","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://access.redhat.com/security/cve/CVE-2024-4540","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2279303","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-4540.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2024-4540"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-4540"}],"tags":["nvd","csaf","vex","red-hat","cve.org"],"epss":0.00551,"epssPercentile":0.45893,"ingestedAt":"2026-10-09T18:07:39.401Z","vendor":"Red Hat","product":"Red Hat build of Keycloak 22","affected":["single_sign_on_7_6_for_rhel_7_server","middleware_containers_for_openshift","single_sign_on_7_6_for_rhel 8","build_of_keycloak 22","build_of_keycloak 24","single_sign_on_7_6_for_rhel 9","build_of_keycloak","single_sign_on 7"],"patched":["single_sign_on_7_6_for_rhel_7_server","middleware_containers_for_openshift","single_sign_on_7_6_for_rhel 8","build_of_keycloak 22","build_of_keycloak 24","single_sign_on_7_6_for_rhel 9","build_of_keycloak","single_sign_on 7"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2024-06-03T16:13:25.347543Z"},"slug":"CVE-2024-4540","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2024:3566** · Red Hat · fixed in: Red Hat Single Sign-On 7.6 for RHEL 7 Server · released 2024-06-03 · [advisory](https://access.redhat.com/errata/RHSA-2024:3566)\n- **RHSA-2024:3570** · Red Hat · fixed in: Middleware Containers for OpenShift · released 2024-06-03 · [advisory](https://access.redhat.com/errata/RHSA-2024:3570)\n- **RHSA-2024:3567** · Red Hat · fixed in: Red Hat Single Sign-On 7.6 for RHEL 8 · released 2024-06-03 · [advisory](https://access.redhat.com/errata/RHSA-2024:3567)\n- **RHSA-2024:3573** · Red Hat · fixed in: Red Hat build of Keycloak 22 · released 2024-06-03 · [advisory](https://access.redhat.com/errata/RHSA-2024:3573)\n- **RHSA-2024:3576** · Red Hat · fixed in: Red Hat build of Keycloak 24 · released 2024-06-03 · [advisory](https://access.redhat.com/errata/RHSA-2024:3576)\n- **RHSA-2024:3568** · Red Hat · fixed in: Red Hat Single Sign-On 7.6 for RHEL 9 · released 2024-06-03 · [advisory](https://access.redhat.com/errata/RHSA-2024:3568)\n- **RHSA-2024:3574** · Red Hat · fixed in: Red Hat Build of Keycloak · released 2024-06-03 · [advisory](https://access.redhat.com/errata/RHSA-2024:3574)\n- **RHSA-2024:3572** · Red Hat · fixed in: Red Hat Single Sign-On 7 · released 2024-06-03 · [advisory](https://access.redhat.com/errata/RHSA-2024:3572)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}