CVE-2026-75034

EUVD-2026-70512

03.09.2026, 16:18

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.

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	Primary	7.4 HIGH	NETWORK	HIGH	NONE	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Base Score

CVSS 3.x

EPSS Score

Percentile: 23.76%

Affected Products (NVD)

Vendor	Product	Version
suse	rancher	𝑥 < 2.15.1

𝑥

= Vulnerable software versions

Common Weakness Enumeration

CWE-294 - Authentication Bypass by Capture-replay
A capture-replay flaw exists when the design of the software makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes).

References

https://github.com/rancher/rancher/releases/tag/v2.15.1