---
id: CVE-2026-75036
title: >-
  A security vulnerability was discovered in Fleet's Helm template preprocessing
  where templates evaluated by the Fleet controller could reach network
  resources outside the management cluster
summary: >-
  A security vulnerability was discovered in Fleet's Helm template preprocessing
  where templates evaluated by the Fleet controller could reach network
  resources outside the management cluster. A user who can supply bundle content
  to a repo…
severity: none
cwe:
  - CWE-918
  - CWE-1336
published: '2026-09-03'
updated: '2026-09-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-75036'
references:
  - url: 'https://github.com/rancher/fleet/security/advisories/GHSA-x9m6-xcjr-hpjp'
    label: meissner@suse.de
tags:
  - nvd
epss: 0.00363
epssPercentile: 0.27504
ingestedAt: '2026-09-05T20:44:36.756Z'
---

## Overview

A security vulnerability was discovered in Fleet's Helm template preprocessing where templates evaluated by the Fleet controller could reach network resources outside the management cluster. A user who can supply bundle content to a repository referenced by a `GitRepo` resource can cause the Fleet controller to:
- Disclose cluster metadata available to the templating context.
- Reveal information about hosts reachable from the controller's network position.
Because the disclosure channel is name resolution, it may remain effective in environments where outbound traffic is otherwise restricted. The disclosed information is limited to values exposed to the Fleet templating context and to name resolution results. Integrity and availability of managed clusters are not affected.

This issue affects Fleet:
from 0.12.0 before 0.12.19, 
from 0.13.0 before 0.13.15, 
from 0.14.0 before 0.14.10, 
from 0.15.0 before 0.15.6, and
from 0.16.0 before 0.16.1.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.