CVE-2024-4540
Keycloak: exposure of sensitive information in pushed authorization requests (par) kc_restart cookie
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.
INFO
Published Date :
June 3, 2024, 4:15 p.m.
Last Modified :
Feb. 25, 2026, 9:16 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2024-4540
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update the Red Hat Single Sign-On package.
- Follow the guidance in the relevant Red Hat Security Advisories.
Public PoC/Exploit Available at Github
CVE-2024-4540 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-4540.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-4540 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-4540
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
This is a list of artifacts from the GitHub Advisory Database where the corresponding JSON files are missing CVE identifiers, despite the fact that these artifacts are listed in the NVD (National Vulnerability Database). I cross-referenced the data, retrieved the missing CVEs, and compiled everything into a list.
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-4540 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-4540 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
Feb. 25, 2026
Action Type Old Value New Value Added CWE CWE-312 Removed CWE CWE-200 -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://access.redhat.com/errata/RHSA-2024:3566 Added Reference https://access.redhat.com/errata/RHSA-2024:3567 Added Reference https://access.redhat.com/errata/RHSA-2024:3568 Added Reference https://access.redhat.com/errata/RHSA-2024:3570 Added Reference https://access.redhat.com/errata/RHSA-2024:3572 Added Reference https://access.redhat.com/errata/RHSA-2024:3573 Added Reference https://access.redhat.com/errata/RHSA-2024:3574 Added Reference https://access.redhat.com/errata/RHSA-2024:3575 Added Reference https://access.redhat.com/errata/RHSA-2024:3576 Added Reference https://access.redhat.com/security/cve/CVE-2024-4540 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2279303 -
CVE Modified by [email protected]
Jun. 03, 2024
Action Type Old Value New Value Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:3566 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:3567 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:3568 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:3570 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:3572 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:3573 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:3574 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:3575 [No types assigned] Added Reference Red Hat, Inc. https://access.redhat.com/errata/RHSA-2024:3576 [No types assigned] -
CVE Received by [email protected]
Jun. 03, 2024
Action Type Old Value New Value Added 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. Added Reference Red Hat, Inc. https://access.redhat.com/security/cve/CVE-2024-4540 [No types assigned] Added Reference Red Hat, Inc. https://bugzilla.redhat.com/show_bug.cgi?id=2279303 [No types assigned] Added CWE Red Hat, Inc. CWE-200 Added CVSS V3.1 Red Hat, Inc. AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N