Openclaw cli: OpenClaw: Sandboxed sessions_spawn(runtime="acp") bypassed sandbox inheritance and allowed host ACP initialization
Description
A vulnerability in the Openclaw CLI allowed sandboxed sessions using runtime="acp" to bypass sandbox inheritance and initialize host-side ACP runtime. This sandbox-boundary bypass could lead to high impact on confidentiality, integrity, and availability. The issue affects Openclaw versions from 2026.1.29 up to but not including 2026.3.2. A patch is available in version 2026.3.2 that denies ACP spawn from sandboxed requester sessions and rejects sandbox="require" for runtime="acp".
CVSS v3.1
Score 8.0high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Openclaw CLI had a security flaw where sandboxed sessions spawned with runtime="acp" did not enforce sandbox inheritance checks, unlike runtime="subagent". This allowed sandboxed sessions to bypass sandbox boundaries and initialize host-side ACP runtime, effectively escaping the sandbox. The fix introduced fail-closed behavior for ACP spawns from sandboxed sessions and disallowed sessions_spawn calls with runtime="acp" and sandbox="require". The patch aligns sandboxed prompt guidance to avoid advertising blocked ACP paths. The vulnerability is tracked with a CVSS 3.1 score of 8.0, indicating high severity.
Potential Impact
The vulnerability enables sandbox-boundary bypass, allowing a sandboxed session to initialize host-side ACP runtime. This can compromise confidentiality, integrity, and availability of the host environment by escaping sandbox restrictions. The CVSS score of 8.0 reflects the high impact potential of this flaw.
Mitigation Recommendations
A patch is available in Openclaw CLI version 2026.3.2 that fixes this issue by denying ACP spawns from sandboxed requester sessions and rejecting sandbox="require" for runtime="acp". Users should upgrade to version 2026.3.2 or later to remediate this vulnerability.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BREW-openclaw-cli-GHSA-474h-prjg-mmw3
- Osv Schema Version
- 1.7.3
- Ecosystems
- ["Homebrew"]
- Cvss Version
- 3.1
Threat ID: 6ac245d312601ec6a316800c
Added to database: 10/04/2026, 12:25:55 UTC
Last enriched: 10/04/2026, 13:16:14 UTC
Last updated: 10/04/2026, 13:16:14 UTC
Views: 3
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