GHSA-9q36-67vc-rrwg
OpenClaw: Sandboxed /acp spawn requests could initialize host ACP sessions
Packages
Details
As written in the advisory (Markdown source, shown as plain text).
### Summary
Sandboxed requester sessions could reach host-side ACP session initialization through `/acp spawn`.
OpenClaw already blocked `sessions_spawn({ runtime: "acp" })` from sandboxed sessions, but the slash-command path initialized ACP directly without applying the same host-runtime guard first.
### Affected Packages / Versions
- npm package: `openclaw`
- Affected versions: `<= 2026.3.2`
- Patched version: `>= 2026.3.7`
### Details
ACP sessions run on the host, not inside the OpenClaw sandbox. The direct ACP spawn path in `src/agents/acp-spawn.ts` already denied sandboxed requesters, but `/acp spawn` in `src/auto-reply/reply/commands-acp/lifecycle.ts` called `initializeSession(...)` without first applying the same restriction.
In affected versions, an already authorized sender in a sandboxed session could use `/acp spawn` to cross from sandboxed chat context into host-side ACP runtime initialization when ACP was enabled and a backend was available.
### Fix Commit(s)
- `61000b8e4ded919ca1a825d4700db4cb3fdc56e3`
### Fix Details
The fix introduced a shared ACP runtime-policy guard in `src/agents/acp-spawn.ts` and reused it from the `/acp spawn` handler in `src/auto-reply/reply/commands-acp/lifecycle.ts` before any ACP backend initialization. Regression coverage was added in `src/auto-reply/reply/commands-acp.test.ts` to prove sandboxed `/acp spawn` requests are rejected early, while existing ACP spawn behavior for non-sandboxed sessions remains unchanged.
### Release Process Note
Patched version is pre-set to `2026.3.7` so the advisory can be published once that npm release is available.
Thanks @tdjackey for reporting.
References
External links from the advisory. They lead to third-party sites.
- https://github.com/openclaw/openclaw/security/advisories/GHSA-9q36-67vc-rrwg
- https://nvd.nist.gov/vuln/detail/CVE-2026-27646
- https://github.com/openclaw/openclaw/commit/61000b8e4ded919ca1a825d4700db4cb3fdc56e3
- https://github.com/openclaw/openclaw
- https://github.com/openclaw/openclaw/releases/tag/v2026.3.7
- https://vulncheck.com/advisories/openclaw-mar-sandbox-escape-via-acp-spawn-command