SUSE Rancher up to 0.16.1 Git webhook receiver spec.pollingInterval improper authorization

Summaryinfo

A vulnerability labeled as problematic has been found in SUSE Rancher up to 0.16.1. This affects an unknown function of the component Git webhook receiver. The manipulation of the argument spec.pollingInterval results in improper authorization. This vulnerability was named CVE-2026-93539. The attack may be performed from remote. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, was found in SUSE Rancher up to 0.16.1. Affected is an unknown part of the component Git webhook receiver. The manipulation of the argument spec.pollingInterval with an unknown input leads to a improper authorization vulnerability. CWE is classifying the issue as CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on integrity, and availability. CVE summarizes:

A vulnerability was discovered in Fleet's Git webhook receiver (the gitjob webhook service). When a webhook secret is not configured, incoming webhook requests are accepted without verification, and processing a request can change the spec.pollingInterval field of a matching GitRepo resource in any namespace. A caller with network access to the webhook service and no Kubernetes credentials can therefore alter GitRepo configuration outside the namespaces they are authorized for.  This only affects SUSE Rancher Fleet 0.16 before 0.16.2, older versions are not affected.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-93539 since 09/18/2026. 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 $0-$5k at the moment (estimation calculated on 09/28/2026). This vulnerability is assigned to T1548.002 by the MITRE ATT&CK project.

Upgrading to version 0.16.2 eliminates this vulnerability.

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Productinfo

Vendor

• SUSE

Name

• Rancher

Version

• 0.16.0
• 0.16.1

License

• open-source

Website

• Vendor: https://www.suse.com/

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