CVE detail
CVE-2026-4636
A flaw was found in Keycloak. An authenticated user with the uma_protection role can bypass User-Managed Access (UMA) policy validation. This allows the attacker to include resource identifiers owned by other users in a policy creation request, even if the URL path specifies an attacker-owned resource. Consequently, the attacker gains unauthorized permissions to victim-owned resources, enabling them to obtain a Requesting Party Token (RPT) and access sensitive information or perform unauthorized actions.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 20.8 · diversity 11.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 0
- within the 30d window
- Peak daily
- 0
- highest bucket
Evidence
Source links by recency
7 source links · newest first
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4636.jsonsecurity.access.redhat.com
No excerpt available.
Vendor Advisorysecurity.access.redhat.comApr 2, 2026, 1:16 PM - https://bugzilla.redhat.com/show_bug.cgi?id=2450251bugzilla.redhat.com
No excerpt available.
Exploitbugzilla.redhat.comApr 2, 2026, 1:16 PM - https://access.redhat.com/security/cve/CVE-2026-4636access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comApr 2, 2026, 1:16 PM - https://access.redhat.com/errata/RHSA-2026:6478access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comApr 2, 2026, 1:16 PM - https://access.redhat.com/errata/RHSA-2026:6477access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comApr 2, 2026, 1:16 PM - https://access.redhat.com/errata/RHSA-2026:6476access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comApr 2, 2026, 1:16 PM - https://access.redhat.com/errata/RHSA-2026:6475access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comApr 2, 2026, 1:16 PM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
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