Nullclaw NullHub up to 2026.5.29 Management API auth_token missing authentication

Summaryinfo

A vulnerability was found in Nullclaw NullHub up to 2026.5.29 and classified as critical. Affected by this vulnerability is an unknown functionality of the component Management API. Executing a manipulation of the argument auth_token can lead to missing authentication. This vulnerability is handled as CVE-2026-110616. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Nullclaw NullHub up to 2026.5.29. It has been declared as critical. This vulnerability affects an unknown code of the component Management API. The manipulation of the argument auth_token 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:

NullHub through 2026.5.29 contains a missing authentication vulnerability that allows unauthenticated attackers to access the /api/* management API because the auth_token field defaults to null and is never assigned. Attackers sending requests without Authorization or Origin headers to non-loopback listeners can control agent instances, rewrite configurations including provider credentials, and manage cron jobs and MCP servers.

The advisory is available at hackmd.io. This vulnerability was named CVE-2026-110616 since 10/14/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. 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 10/14/2026).

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

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Productinfo

Vendor

• Nullclaw

Name

• NullHub

Version

• 2026.5.0
• 2026.5.1
• 2026.5.2
• 2026.5.3
• 2026.5.4
• 2026.5.5
• 2026.5.6
• 2026.5.7
• 2026.5.8
• 2026.5.9
• 2026.5.10
• 2026.5.11
• 2026.5.12
• 2026.5.13
• 2026.5.14
• 2026.5.15
• 2026.5.16
• 2026.5.17
• 2026.5.18
• 2026.5.19
• 2026.5.20
• 2026.5.21
• 2026.5.22
• 2026.5.23
• 2026.5.24
• 2026.5.25
• 2026.5.26
• 2026.5.27
• 2026.5.28
• 2026.5.29

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