CVE-2026-27646: OpenClaw < 2026.3.7 - Sandbox Escape via /acp spawn Command

Severity: medium (CVSS 6.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-23 · updated 2026-06-17
Weakness: CWE-863

Description

OpenClaw versions prior to 2026.3.7 contain a sandbox escape vulnerability in the /acp spawn command that allows authorized sandboxed sessions to initialize host-side ACP runtime. Attackers can bypass sandbox restrictions by invoking the /acp spawn slash-command to cross from sandboxed chat context into host-side ACP session initialization when ACP is enabled.

Affected products

OpenClaw: before 2026.3.7 — fixed in 2026.3.7

How to fix

Upgrade to a fixed version: OpenClaw 2026.3.7. Check the vendor advisory for mitigations.

References

https://github.com/openclaw/openclaw/commit/61000b8e4ded919ca1a825d4700db4cb3fdc56e3
https://github.com/openclaw/openclaw/security/advisories/GHSA-9q36-67vc-rrwg
https://vulncheck.com/advisories/openclaw-mar-sandbox-escape-via-acp-spawn-command

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