CVE-2026-103314 Red Hat Advanced Cluster Security for Kubernetes - Authentication Bypass

Red Hat Advanced Cluster Security for Kubernetes contains a broken authentication caused by Central SAML authentication ACS endpoint not retaining used SAML assertion or response identifiers, letting attackers replay valid SAML responses to obtain multiple authentication tokens, exploit requires valid signed SAML response.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
19 October 2026
Updated
20 October 2026
Weakness
CWE-294

Vendor fix

Update to the latest version with SAML assertion replay protection.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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