# CVE-2026-92857

Keycloak dynamic client registration lets attackers forge tokens to impersonate users

- Page: https://www.vulneraibility.com/cve/CVE-2026-92857
- CVSS: 8.1
- Known exploited: not in CISA KEV as of our last sync
- Weakness: CWE-20
- Published: 2026-11-05

## Affected

- Keycloak
- Red Hat SSO (downstream)
- Applications relying on Keycloak-issued tokens

## Impact

Attackers can register malicious clients that forge 'sub'/'aud' in signed tokens to impersonate users and gain unauthorized access to services.

## Action

Immediate action required

## Recommendation

Apply vendor update immediately; revoke/rotate affected tokens; audit and restrict client registrations

## References

- [other] https://access.redhat.com/security/cve/CVE-2026-92857
- [other] https://bugzilla.redhat.com/show_bug.cgi?id=2535817

---
Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.