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VulnerabilityPublished Updated

CVE-2026-18569: CWE-347

Source GCVE Database

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Authoritative record:CVE-2026-18569· Low 3.7

Not known to be exploited · CVSS 3.7 Low · fixed in Red Hat build of Keycloak 26.6 package updates : update Red Hat build of Keycloak 26.6 when convenient.

Data as of 7 Nov 2026, 13:33 UTC

CVSS 3.1 base score
3.7Low
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.13.7
Patch
Available – fixed in 26.6.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat build of Keycloak 26.6rhbk/keycloak-operator-bundleAffected–Fixed in–
Red Hat build of Keycloak 26.6rhbk/keycloak-rhel9Affected–Fixed in–
Red Hat build of Keycloak 26.6rhbk/keycloak-rhel9-operatorAffected–Fixed in–
Red Hat build of Keycloak 26.6.8keycloak-servicesAffected–Fixed in–
Red Hat build of Keycloak 26.6.8rhbk-keycloak-rhel9/rhbk-keycloak-rhel9Affected–Fixed in–
Red Hat build of Keycloak 26.6.8rhbk-openshift-rhel9/rhbk-openshift-rhel9Affected–Fixed in–

AI-suggested

Red Hat has released an updated package for the Red Hat build of Keycloak version 26.6.8 that addresses this and multiple other security issues. Users should upgrade to version 26.6.8 or later to remediate this vulnerability. No additional mitigation steps are indicated beyond applying the official update.

Description

A vulnerability in the backchannel logout endpoint of the keycloak-services component in the Red Hat Build of Keycloak allows logout requests without cryptographic signatures to be accepted if an OIDC identity provider is configured to skip signature validation. This flaw can be exploited by an attacker with knowledge of certain user session details to forcibly log out the user, causing potential disruption. The issue has a low severity rating and a CVSS score of 3.7.

References

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