Sipeed PicoClaw up to 0.2.9 First Run Setup access_control.go allowed_cidrs authentication bypass

Summaryinfo

A vulnerability described as critical has been identified in Sipeed PicoClaw up to 0.2.9. This affects an unknown function of the file web/backend/middleware/access_control.go of the component First Run Setup. Executing a manipulation of the argument allowed_cidrs can lead to authentication bypass. The identification of this vulnerability is CVE-2026-16198. The attack may be launched remotely. Furthermore, there is an exploit available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in Sipeed PicoClaw up to 0.2.9. It has been declared as critical. This vulnerability affects an unknown code block of the file web/backend/middleware/access_control.go of the component First Run Setup. The manipulation of the argument allowed_cidrs with an unknown input leads to a authentication bypass vulnerability. The CWE definition for the vulnerability is CWE-288. A product requires authentication, but the product has an alternate path or channel that does not require authentication. As an impact it is known to affect confidentiality, integrity, and availability.

The advisory is available at github.com. This vulnerability was named CVE-2026-16198. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known.

It is possible to download the exploit at github.com. It is declared as proof-of-concept.

Applying the patch 017601354be38cb027ff3ffb01aed79bd5d12610 is able to eliminate this problem. The bugfix is ready for download at github.com.

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Productinfo

Vendor

• Sipeed

Name

• PicoClaw

Version

• 0.2.0
• 0.2.1
• 0.2.2
• 0.2.3
• 0.2.4
• 0.2.5
• 0.2.6
• 0.2.7
• 0.2.8
• 0.2.9

License

• open-source

Website

• Product: https://github.com/sipeed/picoclaw/

CPE 2.3info

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CPE 2.2info

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Submitinfo

Accepted

• Submit #852965: Sipeed PicoClaw <= v0.2.9 Authentication Bypass Using an Alternate Path or Channel (CWE-288) (by Eric-i)

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