CVE-2026-103314

high

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

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-104252

https://bugzilla.redhat.com/show_bug.cgi?id=2543879

https://access.redhat.com/security/cve/CVE-2026-103314

https://access.redhat.com/errata/RHSA-2026:85932

Details

Source: Mitre, NVD

Published: 2026-10-19

Updated: 2026-10-20

Risk Information

CVSS v2

Base Score: 7.1

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 7.4

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Severity: High

EPSS

EPSS: 0.00307