OpenClaw's ACP child sessions inherit subagent security envelope constraints
## Summary ACP child sessions inherit subagent security envelope constraints. ## Affected Packages / Versions - Package: openclaw (npm) - Affected versions: <= 2026.4.21 - Fixed version: 2026.4.22 ## Impact A restricted subagent spawning an ACP child session could fail to carry forward subagent-only constraints such as depth, child-count limits, control scope, or target-agent restrictions. ## Fix ACP spawn now resolves and persists child subagent envelope fields, enforces maximum depth and active-child caps, and applies the inherited control scope to child ACP sessions. ## Fix Commit(s) - 31160dc069b7cc5d833b39c53736a41ad3befda2 ## Verification - The fix commit is contained in the public v2026.4.22 tag. - openclaw@2026.4.22 is published on npm and the compiled package contains the fix. - Focused regression coverage for this path passed before publication. OpenClaw thanks @zsxsoft, @qclawer, and @KeenSecurityLab for reporting.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-44997US | — | — | ||
OpenClaw before 2026.4.22 contains a security envelope constraint bypass vulnerability allowing restricted subagents to spawn ACP child sessions that fail to inherit depth, child-c… | ||||
references
External citations — patches, advisories, analysis.
- https://github.com/openclaw/openclawPACKAGE
- https://github.com/openclaw/openclaw/commit/31160dc069b7cc5d833b39c53736a41ad3befda2WEB
- https://github.com/openclaw/openclaw/security/advisories/GHSA-q3jj-46pq-826rWEB
- https://nvd.nist.gov/vuln/detail/CVE-2026-44997ADVISORY
- https://www.vulncheck.com/advisories/openclaw-security-envelope-constraint-bypass-in-acp-child-sessionsWEB
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