SUSE Rancher/Rancher Webhook inheritedNamespacedRules privileges management

Summaryinfo

A vulnerability was found in SUSE Rancher and Rancher Webhook and classified as critical. The affected element is an unknown function. The manipulation of the argument inheritedNamespacedRules results in privileges management. This vulnerability is known as CVE-2026-88810. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in SUSE Rancher and Rancher Webhook (the affected version is unknown). Affected is an unknown code. The manipulation of the argument inheritedNamespacedRules 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 privilege escalation issue was discovered in Rancher Manager's role-based access control. The inheritedNamespacedRules field of a GlobalRole propagates permissions into named namespaces of every downstream cluster managed by the Rancher instance, but it was not subject to the privilege-escalation validation applied to the other permission-carrying fields of a GlobalRole. As a result, a non-administrative user could be granted, through a global role  binding, permissions in downstream clusters that exceed the permissions that user already holds. This affected SUSE Rancher 2.15.2 only, and SUSE Rancher Webhook 0.11.0 up to 0.11.4, and 0.12.0 up to 0.12.1.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-88810 since 09/10/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 11/02/2026). This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• SUSE

Name

• Rancher
• Rancher Webhook

License

• open-source

Website

• Vendor: https://www.suse.com/

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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