CVE-2026-103314: Red Hat Advanced Cluster Security · CWE-294
Source GCVE Database
Not known to be exploited · CVSS 7.4 High : patch Red Hat Advanced Cluster Security for Kubernetes 4.10 soon.
Data as of 29 Oct 2026, 22:46 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 7.4 |
|---|
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 19 Oct 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 29 Oct 2026.
What to do
Patches and advisories
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Advanced Cluster Security for Kubernetes 4.10advanced-cluster-security/rhacs-main-rhel8 | Affected– | Fixed in– |
| Red Hat Advanced Cluster Security for Kubernetes for IBM Z and LinuxONE 4.11advanced-cluster-security/rhacs-main-rhel9 | Affected– | Fixed in– |
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.
References
- nvd.nist.gov/vuln/detail/CVE-2026-103314 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:85932 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:92342 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-103314 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2543879 (opens in a new tab)