SUSE Rancher up to 0.14.10/0.15.6/0.16.1 Fleet privileges management

Summaryinfo

A vulnerability classified as very critical was found in SUSE Rancher up to 0.14.10/0.15.6/0.16.1. This issue affects some unknown processing of the component Fleet. The manipulation results in privileges management. This vulnerability is identified as CVE-2026-88808. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as very critical, was found in SUSE Rancher up to 0.14.10/0.15.6/0.16.1. Affected is an unknown function of the component Fleet. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-88808 since 09/10/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 09/28/2026). The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 0.14.11, 0.15.7 or 0.16.2 eliminates this vulnerability.

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Productinfo

Vendor

• SUSE

Name

• Rancher

Version

• 0.14.0
• 0.14.1
• 0.14.2
• 0.14.3
• 0.14.4
• 0.14.5
• 0.14.6
• 0.14.7
• 0.14.8
• 0.14.9
• 0.14.10
• 0.15.0
• 0.15.1
• 0.15.2
• 0.15.3
• 0.15.4
• 0.15.5
• 0.15.6
• 0.16.0
• 0.16.1

License

• open-source

Website

• Vendor: https://www.suse.com/

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