Vulnerability details
CVE-2026-110616
nullclaw NullHub
NullHub through 2026.5.29 Missing Authentication for /api Management API
CVSS 4.0
9.2Critical
Official description
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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.2Critical | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| 8.1High | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| nullclaw | NullHub | v ≤ 2026.5.29 | CVEProject cvelistV5 (CNA) |
References and advisories
6- https://github.com/nullclaw/nullhub/blob/v2026.5.29/src/server.zig#L546-L556 technical-description
- https://github.com/nullclaw/nullhub/blob/v2026.5.29/src/api/settings.zig#L29-L54 technical-description
- https://github.com/nullclaw/nullhub/blob/v2026.5.29/Dockerfile#L69-L71 technical-description
- https://github.com/nullclaw/nullhub product
- https://www.vulncheck.com/advisories/nullhub-through-2026.5.29-missing-authentication-for-api-management-api third-party-advisory
- https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/rJrLma3izg third-party-advisory
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Details
- Published
- 2026-10-14
- Last updated
- 2026-10-20
- State
- Published
- Assigner (CNA)
- VulnCheck
- Kolun priority
- 29 · Low
Exploit prediction (EPSS)
0.95%
Probability of exploitation in 30 days
61.4%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-306Missing Authentication for Critical Function