CVE detail
CVE-2026-9704
A flaw was found in Keycloak. An authenticated user with low privileges can exploit this vulnerability by sending an oversized subject_token JSON Web Token (JWT) to the TokenEndpoint. When the token exceeds a 4000-character limit, it is silently dropped, causing the system to fall back to client credentials. This allows the user to gain the permissions of the client's service account, leading to privilege escalation.
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 19.5 · diversity 10.0 · 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
6 source links · newest first
- https://bugzilla.redhat.com/show_bug.cgi?id=2481877bugzilla.redhat.com
No excerpt available.
Exploitbugzilla.redhat.comMay 27, 2026, 2:17 PM - https://access.redhat.com/security/cve/CVE-2026-9704access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comMay 27, 2026, 2:17 PM - https://access.redhat.com/errata/RHSA-2026:30050access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comMay 27, 2026, 2:17 PM - https://access.redhat.com/errata/RHSA-2026:30049access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comMay 27, 2026, 2:17 PM - https://access.redhat.com/errata/RHSA-2026:25098access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comMay 27, 2026, 2:17 PM - https://access.redhat.com/errata/RHSA-2026:25097access.redhat.com
No excerpt available.
Vendor Advisoryaccess.redhat.comMay 27, 2026, 2:17 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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