CVE & CISA-KEV Catalog

CVE-2026-88808

HIGH
8.8
CVSS v3
NVD

Description

A vulnerability has been identified within Rancher Manager where the Fleet agent wrote resources to downstream clusters using its own cluster-admin credentials instead of the ServiceAccount pinned to the deployment. It affects multi-tenancy environments where different tenants share the same downstream clusters, for example different privileged or untrusted teams inside the same organization. This could lead to overwritten configuration files. This issue affected SUSE Rancher Fleet 0.16 before 0.16.2, 0.15 before 0.15.7, and 0.14 before 0.14.11.

CWE-250

How to fix

Remediation Available
rancher fleetNVD
Affected:>= 0.16.0, < 0.16.2Fixed in:0.16.2CVE-2026-88808derived from NVD
Affected:>= 0.15.0, < 0.15.7Fixed in:0.15.7CVE-2026-88808derived from NVD
Affected:>= 0.14.0, < 0.14.11Fixed in:0.14.11CVE-2026-88808derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

0.28%probability of exploitation in 30 days
20thpercentile

Low risk: more likely to be exploited than 20% of all known CVEs.

References

Vendor Advisory1

Related Vulnerabilities

Other CWE-250 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2024-1222High8.664%-Fix
CVE-2025-12420Critical9.853%-Fix
CVE-2024-38813High7.517%KEVFix
CVE-2026-29205High8.68.4%-Fix
CVE-2025-34515Critical9.88.0%--
CVE-2019-16765High7.45.4%-Fix

Common questions

How do I fix CVE-2026-88808?

Upgrade rancher fleet to 0.16.2 or later.

Is CVE-2026-88808 being actively exploited?

Not that we know of. CVE-2026-88808 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.28% is the estimated probability that it will be exploited in the next 30 days. That is higher than 20% of all scored CVEs.

How severe is CVE-2026-88808?

CVE-2026-88808 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-88808 affect?

Published advisories record a fix for rancher fleet (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

Embed a live status badge for CVE-2026-88808
CVE-2026-88808 severity badge

Markdown

[![CVE-2026-88808](https://tridentstack.com/cve/badge/CVE-2026-88808.svg)](https://tridentstack.com/cve/CVE-2026-88808)

HTML

<a href="https://tridentstack.com/cve/CVE-2026-88808"><img src="https://tridentstack.com/cve/badge/CVE-2026-88808.svg" alt="CVE-2026-88808"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Run a free CVE scan on your fleetStart freeThis CVE lookup is free and always will be.

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-07.