major vulnerability· requires attention

Keycloak is a widely used identity provider; token forgery enables impersonation and unauthorized access across many enterprise apps and services.

Applications

CVE-2026-92857

8.1

High

EPSS n/aPatch available

Keycloak dynamic client registration lets attackers forge tokens to impersonate users

exploited

No known exploitation not in CISA KEV as of our last sync

fix

Patch available see the advisory in the references

likelihood

No EPSS score yet

Published 5 Nov 2026Analysed here 6 Nov 2026CVSS scored by the publisher (CNA)

common questions

Is CVE-2026-92857 being exploited?

Not confirmed. CVE-2026-92857 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.

How severe is CVE-2026-92857?

CVE-2026-92857 is rated High with a CVSS score of 8.1. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2026-92857?

Yes. A fix has been recorded for CVE-2026-92857. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2026-92857 affect?

CVE-2026-92857 affects Keycloak, Red Hat SSO (downstream), Applications relying on Keycloak-issued tokens. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

What should I do about CVE-2026-92857?

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

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary

technical analysis

affected

KeycloakRed 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 required

Immediate action required

timeline

5 Nov 2026Published
5 Nov 2026CVE record last updated · same day later
6 Nov 2026Analysed by vulneraibility.com · 1 day later

how to fix

Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.

references

NVD CVE.org CVE Details Source

2 references in the CVE record: 2 links

Linkaccess.redhat.com /security/cve/CVE-2026-92857
Linkbugzilla.redhat.com /show_bug.cgi?id=2535817

sources

CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
NVD: CVSS and CPE data
FIRST EPSS: exploit probability and percentile
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

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