GHSA-6fvr-66p3-3qj4: OpenClaw: Hook-triggered CLI runs could receive owner MCP tool authority

Summary OpenClaw hook ingress can start automated agent runs using a configured hook token. In affected releases, a hook-triggered run could select a bundled CLI backend that received owner-scoped MCP loopback authority instead of a scope appropriate for hook ingress. This issue affects the boundary between hook-token automation and owner-only MCP tools. It does not affect deployments with hooks disabled. Affected configurations This affects deployments where hooks are enabled, /hooks/agent is reachable with a valid hook token, and a bundled CLI backend can be selected for the hook-triggered run. Impact A caller with the hook token could cause the spawned CLI runtime to see or call MCP tools that should have been owner-only. The practical impact depends on which MCP tools are available; the reported proof used persistent cron state as a representative owner-only action. Patched Versions The first stable patched version is 2026.5.20. Fixed in the 2026.5.20 stable release. Mitigations Upgrade to openclaw@2026.5.20 or later. Keep hook tokens secret, restrict network access to hook endpoints, and disable hooks when they are not needed.