SUSE Rancher up to 0.7.9/0.8.6/0.9.5/0.10.6 in-cluster rancher-webhook Service missing authentication

Summaryinfo

A vulnerability described as critical has been identified in SUSE Rancher up to 0.7.9/0.8.6/0.9.5/0.10.6. Affected by this issue is some unknown functionality of the component in-cluster rancher-webhook Service. Executing a manipulation can lead to missing authentication. This vulnerability appears as CVE-2026-44949. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in SUSE Rancher up to 0.7.9/0.8.6/0.9.5/0.10.6. It has been declared as critical. This vulnerability affects an unknown code block of the component in-cluster rancher-webhook Service. The manipulation with an unknown input leads to a missing authentication vulnerability. The CWE definition for the vulnerability is CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A Rancher FleetWorkspace admission path allowed side effects to occur in the Rancher webhook handler for versions 0.7.0 up to 0.7.10, 0.8.0 up to 0.8.7, 0.9.0 up to 0.9.6 and 0.10.0 up to 0.10.7. An unauthenticated attacker with network access to the in-cluster rancher-webhook service could submit a crafted admission payload and cause workspace-related Kubernetes objects to be created with attacker-chosen identity data.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-44949 since 05/08/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 06/30/2026).

Upgrading to version 0.7.10, 0.8.7, 0.9.6 or 0.10.7 eliminates this vulnerability.

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Productinfo

Vendor

• SUSE

Name

• Rancher

Version

• 0.7.0
• 0.7.1
• 0.7.2
• 0.7.3
• 0.7.4
• 0.7.5
• 0.7.6
• 0.7.7
• 0.7.8
• 0.7.9
• 0.8.0
• 0.8.1
• 0.8.2
• 0.8.3
• 0.8.4
• 0.8.5
• 0.8.6
• 0.9.0
• 0.9.1
• 0.9.2
• 0.9.3
• 0.9.4
• 0.9.5
• 0.10.0
• 0.10.1
• 0.10.2
• 0.10.3
• 0.10.4
• 0.10.5
• 0.10.6

License

• open-source

Website

• Vendor: https://www.suse.com/

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