GHSA-474h-prjg-mmw3 OpenClaw: Sandboxed sessions_spawn(runtime="acp") bypassed sandbox inheritance and allowed host ACP initialization

• npm openclaw: < 2026.3.2 → fixed in 2026.3.2

Summary Sandboxed `sessions_spawn(runtime="acp")` could bypass sandbox inheritance and initialize host-side ACP runtime. The fix now fail-closes ACP spawn from sandboxed requester sessions and rejects `sandbox="require"` for `runtime="acp"`. Affected Packages / Versions • Package: `openclaw` (npm) • Latest published npm version at triage time: `2026.3.1` (March 2, 2026) • Vulnerable range: `<=2026.3.1` • Patched release: `2026.3.2` (released) Technical Details • Root cause: `runtime="subagent"` enforced sandbox inheritance, while `runtime="acp"` did not enforce equivalent sandbox/runtime checks. • Security impact: sandbox-boundary bypass into host-side ACP initialization. • Fixed behavior: • deny ACP spawn when requester runtime is sandboxed • deny `sessions_spawn` with `runtime="acp", sandbox="require"` • align sandboxed prompt guidance to avoid advertising blocked ACP paths Fix Commit(s) • `ac11f0af731d41743ba02d8595f4d0fe747336e3` • `c703aa0fe92df9fb71cf254fc46991e05fba2114`