Advisory severityMedium4.7Vendor: LowRed Hat Linux

Medium [CVE-2024-9666] keycloak proxy header handling denial-of-service (dos) vulnerability

This medium-severity Red Hat Linux advisory covers CVE-2024-9666 affecting Red Hat build of Keycloak 24.0.9, Red Hat build of Keycloak 26.0.6.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2024-9666 Source published Nov 25, 2024Source updated Nov 21, 2024

VulniPulse record published Aug 4, 2026

CVE-2024-9666

Affected products & platforms

Red Hat LinuxUnclassified

Open source advisory

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Summary

A vulnerability was found in the Keycloak Server. 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. Red Hat Enterprise Application Server 8 does not ship the affected component and so is not affected by this flaw.

Red Hat severity: Low — CVSS 4.7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-444.

Affected Red Hat products: Red Hat build of Keycloak 24; Red Hat build of Keycloak 24.0.9; Red Hat build of Keycloak 26.0; Red Hat build of Keycloak 26.0.6; Red Hat Build of Keycloak. Red Hat lists Red Hat JBoss Enterprise Application Platform 8 as not affected.

Red Hat fixing advisory: RHSA-2024:10175, RHSA-2024:10176, RHSA-2024:10177, RHSA-2024:10178.

Affected versions

No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.

Official advisory · high-confidence parse· fetched 17 days ago·verify at source

Fixed versions

rhbk/keycloak-operator-bundle:24.0.9-1
rhbk/keycloak-rhel9:24-18
rhbk/keycloak-rhel9-operator:24-18
rhbk/keycloak-operator-bundle:26.0.6-2
rhbk/keycloak-rhel9:26.0-5
rhbk/keycloak-rhel9-operator:26.0-6
RHSA-2024:10175
RHSA-2024:10176
RHSA-2024:10177
RHSA-2024:10178

Official advisory · high-confidence parse· fetched 17 days ago·verify at source

Mitigation

Upgrade to a fixed release: rhbk/keycloak-operator-bundle:24.0.9-1, rhbk/keycloak-rhel9:24-18, rhbk/keycloak-rhel9-operator:24-18, rhbk/keycloak-operator-bundle:26.0.6-2, rhbk/keycloak-rhel9:26.0-5, rhbk/keycloak-rhel9-operator:26.0-6. That is the remediation for this advisory.

The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 17 days ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Red Hat Security Data APIofficial
Official vendor source used to discover this advisory; it remains the authority for affected products and remediation. Discovered from the machine-readable feed https://access.redhat.com/hydra/rest/securitydata/cve.json; this link opens the Red Hat Linux advisory index instead of the raw feed document.
Red Hat Linux
Official vendor advisoryofficial
Official advisory page fetched and parsed; accepted detail fields are attributed to this page.
Red Hat Linux
CVE.org CNA affected-product recordCVE.org
Structured CNA affected[] data independently confirmed the affected product scope; native advisory content remains authoritative.
CVE Program

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2024-9666NVD CVE.org MITRE

Discussion(0)

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