What is CVE-2026-75034?

CVE-2026-75034 is a high-severity vulnerability, classified under Authentication Bypass by Capture-replay. CVSS score: 7.4/10. Published 2026-09-03.

How severe is CVE-2026-75034?

High severity. CVSS v3 base score is 7.4 out of 10.

CVE-2026-75034

CVE-2026-75034

A flaw was found in Rancher Manager. The SAML assertion replay protection introduced by the fix for CVE-2026-44946 recorded consumed assertion IDs in a per-process cache, so each replica only detected replays that reached the same pod. In a high-availability deployment, an attacker holding a captured assertion could replay it once against every other replica to obtain additional authenticated sessions as the victim. This issue affects Rancher: before 2.15.1.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Weakness classification (CWE)

CWE-294 — Authentication Bypass by Capture-replay

References

meissner@suse.de

Frequently asked questions

What is CVE-2026-75034?: CVE-2026-75034 is a high-severity vulnerability, classified under Authentication Bypass by Capture-replay. CVSS score: 7.4/10. Published 2026-09-03.
How severe is CVE-2026-75034?: High severity. CVSS v3 base score is 7.4 out of 10.