CVE-2026-110616
NullHub through 2026.5.29 Missing Authentication for /api Management API
- State
- Published
- Severity
- 9.2 Critical
- Published
- Oct 14, 2026
- Updated
- Oct 20, 2026
- Reserved
- Oct 14, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.2 Critical | 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 | VulnCheck |
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-306 Missing Authentication for Critical Function
Affected Products
| Product | Versions |
|---|---|
NullHubnullclaw |
|
References
- https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/rJrLma3izgthird-party-advisory
- https://github.com/nullclaw/nullhub/blob/v2026.5.29/src/server.zig#L546-L556technical-description
- https://github.com/nullclaw/nullhub/blob/v2026.5.29/src/api/settings.zig#L29-L54technical-description
- https://github.com/nullclaw/nullhub/blob/v2026.5.29/Dockerfile#L69-L71technical-description
- https://github.com/nullclaw/nullhubproduct
- VulnCheck Advisory: NullHub through 2026.5.29 Missing Authentication for /api Management APIthird-party-advisory
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