CVE-2026-110616

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 4.0

9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

1.0% chance of exploitation in the next 30 days; higher than 61% of CVEs (scores of 2026-10-25)

CWE

CWE-306

Published

2026-10-14

Modified

2026-10-20

Record from

the NVD, synced 2026-10-21

References

• https://github.com/nullclaw/nullhub
• https://github.com/nullclaw/nullhub/blob/v2026.5.29/Dockerfile#L69-L71
• https://github.com/nullclaw/nullhub/blob/v2026.5.29/src/api/settings.zig#L29-L54
• https://github.com/nullclaw/nullhub/blob/v2026.5.29/src/server.zig#L546-L556
• https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/rJrLma3izg

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