Is there a public exploit for CVE-2024-9666?

No public exploit for CVE-2024-9666 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-2024-9666?

CVE-2024-9666 scores CVSS 4.7 (v3.1), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.4%.

What does CVE-2024-9666 affect?

CVE-2024-9666 affects Red Hat Red Hat build of Keycloak 26.0, Red Hat build of Keycloak 24.

4.7 Medium

A vulnerability was found in the Keycloak Server.

CVE-2024-9666

A vulnerability was found in the Keycloak Server. The Keycloak Server is vulnerable to a denial of service (DoS) attack due to improper handling of proxy headers. When Keycloak is configured to accept incoming proxy headers, it may accept non-IP values, such as obfuscated identifiers, without proper validation. This issue can lead to costly DNS resolution operations, which an attacker could exploit to tie up IO threads and potentially cause a denial of service. The attacker must have access to send requests to a Keycloak instance that is configured to accept proxy headers, specifically when reverse proxies do not overwrite incoming headers, and Keycloak is configured to trust these headers.

Assessment

CVSS: 4.7 (v3.1)
Severity: Medium
EPSS: 0.4% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 25 November 2024
Last updated: 3 November 2026
Affected: Red Hat · Red Hat build of Keycloak 24 · Red Hat build of Keycloak 26.0
Assigner: redhat

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

At the source

EUVD (ENISA)

References

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