---
id: CVE-2026-75034
title: A flaw was found in Rancher Manager
summary: >-
  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. I…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-294
vendor: suse
product: rancher
affected:
  - rancher < 2.15.1
patched:
  - rancher 2.15.1
published: '2026-09-03'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T14:37:50.827'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75034'
references:
  - url: 'https://github.com/rancher/rancher/releases/tag/v2.15.1'
    label: meissner@suse.de
tags:
  - nvd
epss: 0.00323
epssPercentile: 0.22746
ingestedAt: '2026-09-18T14:43:13.028Z'
---

## Overview

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.

## Affected

- `rancher < 2.15.1`

## Remediation

Upgrade past the affected range:

- `rancher 2.15.1`