CVE-2024-4540 HIGH

CVE-2024-4540: Keycloak: exposure of sensitive information in pushed authorization requests (par) kc_restart cookie

Vendor Red Hat
Product Red Hat Build of Keycloak
Weakness CWE-312 · Cleartext storage
Published June 3, 2024
Last update March 26, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 3, 2024 CVE published
March 26, 2026 Record updated