Critical-Severity Missing Authentication Flaw in nullclaw NullHub Tracked as CVE-2026-110616
A newly published critical vulnerability in nullclaw NullHub carries a CVSS score of 9.2. Here is what is affected and how to respond.
Key points
- CVE-2026-110616 affects nullclaw NullHub.
- CVSS 9.2 (Critical).
- No exploitation confirmed yet.
A critical missing authentication tracked as CVE-2026-110616 has been published in the National Vulnerability Database for nullclaw NullHub, with a CVSS base score of 9.2.
At a glance
- CVE
- CVE-2026-110616
- Product
- nullclaw NullHub
- CVSS
- 9.2 Critical
- Weakness
- missing authentication
- Exploited
- No known exploitation
What is the vulnerability?
The NVD entry states: 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.
Affected versions
| Vendor | Product | Versions |
|---|---|---|
| Nullclaw | NullHub | up to 2026.5.29 |
Is it being exploited?
There is no public confirmation of exploitation at the time of publication. It does not appear in CISA's Known Exploited Vulnerabilities catalog. We will update this report if that changes.
What should you do?
- Identify whether the affected product and versions run in your environment.
- Apply the vendor update listed in the advisory as soon as it is available.
- Limit network exposure of the affected service until it is patched.
- Monitor the vendor advisory for updated guidance or exploitation reports.
What to do and how to stay safe: CVE-2026-110616
- Vulnerability severity scores ignore your specific architecture and context.
- Exploitability depends on network exposure and user behavior, not just code flaws.
- Prioritization requires continuous asset inventory and threat intelligence alignment.
Risk-based vulnerability management focuses your limited resources on the flaws that actually threaten your business. Start by mapping your critical assets and checking for active exploits to prioritize your backlog.
Step-by-step guide: Risk-Based Vulnerability Management: Prioritize Fixes by Actual Danger
General security guidance from the Threat Times newsroom. It is not confirmed advice from the organisations named in this story.
Frequently asked questions
What is CVE-2026-110616?
CVE-2026-110616 is a missing authentication vulnerability in nullclaw NullHub.
How severe is CVE-2026-110616?
It has a CVSS score of 9.2 Critical.
Is CVE-2026-110616 being exploited?
There is no public confirmation of exploitation at the time of publication.
