CVE-2024-4540Keycloak: exposure of sensitive information in pushed authorization requests (par) kc_restart cookie
Updated under an hour ago ()
Does this affect you?
It affects Red Hat Build of Keycloak and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-312
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Deferred
- Record last updated
- Oct 9, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Build of Keycloak redhat:build_keycloak | 22 | CNA record |
Red Hat Red Hat Single Sign-On 7 redhat:red_hat_single_sign_on | 7.6 | CNA record |
Red Hat RHEL-8 based Middleware Containers redhat:rhosemc | from 7.6-49 not affected | CNA record |
References
- https://access.redhat.com/errata/RHSA-2024:3566vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2024:3567vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2024:3568vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2024:3570vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2024:3572vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2024:3573vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2024:3574vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2024:3575vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2024:3576vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2024-4540vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2279303issue-tracking, x-refsource-redhat
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.