Is there a public exploit for CVE-2026-109081?

No public exploit for CVE-2026-109081 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-109081?

CVE-2026-109081 scores CVSS 6.8 (v3.1), rated medium.

What does CVE-2026-109081 affect?

CVE-2026-109081 affects Red Hat Red Hat build of Keycloak 26.6.

6.8 Medium

A flaw was found in Keycloak.

CVE-2026-109081

A flaw was found in Keycloak. The Dynamic Client Registration (DCR) endpoint does not properly validate authorization when processing the deprecated defaultRoles field. An authenticated attacker with client creation privileges or an Initial Access Token (IAT) can inject excessive roles into the realm's default roles configuration. This causes clients across the realm to generate bloated access tokens, resulting in performance and memory degradation that can lead to a Denial of Service (DoS).

Assessment

CVSS: 6.8 (v3.1)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 6 November 2026
Last updated: 6 November 2026
Affected: Red Hat · Red Hat build of Keycloak 26.6
Assigner: redhat

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

At the source

EUVD (ENISA)

References

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