---
title: "CVE-2026-88808: SUSE Rancher Fleet - Broken Access Control"
description: "SUSE Rancher Fleet < 0.16.2, 0.15 < 0.15.7, and 0.14 < 0.14.11 contain a broken access control caused by Fleet agent using cluster-admin credentials instead of pinned ServiceAccount, letting attackers overwrite configuration files in multi-tenant downstream clusters, exploit requires multi-tenant environment."
url: https://panop.io/threat-heartbeat/CVE-2026-88808/
---

# CVE-2026-88808 SUSE Rancher Fleet - Broken Access Control

SUSE Rancher Fleet < 0.16.2, 0.15 < 0.15.7, and 0.14 < 0.14.11 contain a broken access control caused by Fleet agent using cluster-admin credentials instead of pinned ServiceAccount, letting attackers overwrite configuration files in multi-tenant downstream clusters, exploit requires multi-tenant environment.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.28% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-88808)

## Details

Type

Broken Access Control

Impact

Data Tampering

CVSS vector

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

Published

28 September 2026

Updated

15 October 2026

Weakness

[CWE-250](https://cwe.mitre.org/data/definitions/250.html)

## Vendor fix

Upgrade to versions 0.16.2, 0.15.7, 0.14.11 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-88808](https://nvd.nist.gov/vuln/detail/CVE-2026-88808)
- [https://github.com/rancher/fleet/security/advisories/GHSA-q9v4-358v-r8q5](https://github.com/rancher/fleet/security/advisories/GHSA-q9v4-358v-r8q5)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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