---
title: "CVE-2026-103314: Red Hat Advanced Cluster Security for Kubernetes - Authentication Bypass"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-103314/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-103314)

## 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](https://cwe.mitre.org/data/definitions/294.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-103314](https://nvd.nist.gov/vuln/detail/CVE-2026-103314)
- [https://bugzilla.redhat.com/show\_bug.cgi?id=2543879](https://bugzilla.redhat.com/show_bug.cgi?id=2543879)
- [https://access.redhat.com/errata/RHSA-2026:85932](https://access.redhat.com/errata/RHSA-2026:85932)
- [https://access.redhat.com/security/cve/CVE-2026-103314](https://access.redhat.com/security/cve/CVE-2026-103314)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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