CVE-2026-110616
NullHub through 2026.5.29 Missing Authentication for /api Management API
nullclaw NullHub
CVSS
9.2CriticalExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 20 Oct 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.81%Chance of exploitation activity in the next 30 days, higher than 56% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
What fixes it
No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.
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.
Text from CVE List
Affected versions 1
- NullHubaffected: all versions through 2026.5.29CVE List
References 6
- vulncheck.com/advisories/nullhub-through-2026.5.29-missing-authentication-for-api-management-apiAdvisoryvia CVE List
- hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/rJrLma3izgExploitvia CVE List
- github.com/nullclaw/nullhub/blob/v2026.5.29/src/server.zig#L546-L556Referencevia CVE List
- github.com/nullclaw/nullhub/blob/v2026.5.29/src/api/settings.zig#L29-L54Referencevia CVE List
- github.com/nullclaw/nullhub/blob/v2026.5.29/Dockerfile#L69-L71Referencevia CVE List
- github.com/nullclaw/nullhubReferencevia CVE List