major vulnerability· requires attention

Keycloak is widely used for identity/auth; authenticated RCE via policy upload can lead to full system compromise across organizations and is broadly impactful.

Applications

CVE-2026-120984

9.1

Critical

EPSS n/a

Authenticated client-management RCE via malicious JavaScript policy upload in Keycloak

exploited

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

fix

No fixed release stated by the publisher

likelihood

No EPSS score yet

Published 7 Nov 2026Analysed here 7 Nov 2026CVSS scored by the publisher (CNA)

common questions

Is CVE-2026-120984 being exploited?

Not confirmed. CVE-2026-120984 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-2026-120984?

CVE-2026-120984 is rated Critical with a CVSS score of 9.1. 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-2026-120984?

Not known from our data. No patch reference has been recorded for CVE-2026-120984, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.

What does CVE-2026-120984 affect?

CVE-2026-120984 affects Keycloak server, Red Hat SSO (Keycloak-based deployments). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

What should I do about CVE-2026-120984?

Apply vendor update ASAP; restrict client-management access and block client imports until fixed.

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

executive summary

technical analysis

affected

Keycloak serverRed Hat SSO (Keycloak-based deployments)

impact

Authenticated users with client-management rights can upload JS policies that execute on the server, enabling remote code execution and full system compromise.

action required

Immediate action required

timeline

7 Nov 2026Published
7 Nov 2026CVE record last updated · same day later
7 Nov 2026Analysed by vulneraibility.com · same 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-2026-120984
Linkbugzilla.redhat.com /show_bug.cgi?id=2565599

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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