CVE-2026-18569: CWE-347
Source GCVE Database
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
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 3.7 |
|---|
- 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:LExploitation evidence
Disclosed: evidence found.
CVE published 4 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
Patches and advisories
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat build of Keycloak 26.6rhbk/keycloak-operator-bundle | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.6rhbk/keycloak-rhel9 | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.6rhbk/keycloak-rhel9-operator | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.6.8keycloak-services | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.6.8rhbk-keycloak-rhel9/rhbk-keycloak-rhel9 | Affected– | Fixed in– |
| Red Hat build of Keycloak 26.6.8rhbk-openshift-rhel9/rhbk-openshift-rhel9 | Affected– | 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
- nvd.nist.gov/vuln/detail/CVE-2026-18569 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:95761 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:95762 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-18569 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2509755 (opens in a new tab)