7.4
High
CVE-2026-103314 A flaw was found in Red Hat Advanced Cluster Security for Kubernetes (RHACS)
Description
A flaw was found in Red Hat Advanced Cluster Security for Kubernetes (RHACS). The Central SAML authentication ACS endpoint does not retain used SAML assertion or response identifiers to prevent replay. An attacker who obtains a valid, unexpired signed SAML response can submit it multiple times and receive distinct Central authentication tokens for the mapped identity.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Advanced Cluster Security 4 | Versions not published | |
| Red Hat Advanced Cluster Security for Kubernetes 4.11 1792492060 | earliest → < 1792492060 | 1792492060 |
| Red Hat Advanced Cluster Security for Kubernetes 4.10 1793184257 | earliest → < 1793184257 | 1793184257 |
| Red Hat Advanced Cluster Security for Kubernetes for IBM Z and LinuxONE 4.11 1792492060 | earliest → < 1792492060 | 1792492060 |
Other CVEs of Red Hat Advanced Cluster Security 4
The 59 CVEs of Red Hat Advanced Cluster Security 4 →
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CVE-2026-19278
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6.8
Medium