OpenClaw: Leaf subagents could steer sibling sessions across sandbox boundaries
Summary
In affected versions of openclaw, sandboxed leaf subagents could still access the subagents control surface and resolve against the parent requester scope instead of remaining confined to their own session tree.
Impact
A low-privilege sandboxed leaf worker could steer or kill a sibling run owned by the same requester and cause that sibling to execute with its own broader tool policy. This is a sandbox and session-scope boundary bypass.
Affected Packages and Versions
- Package:
openclaw(npm) - Affected versions:
<= 2026.3.8 - Fixed in:
2026.3.11
Technical Details
Leaf subagents retained the subagents tool, and subagent control requests were authorized against the parent requester scope rather than the caller's own spawned descendants. The control path prevented only self-targeting, not cross-sibling steering.
Fix
OpenClaw now removes subagents control access from leaf subagents by default, scopes subagent control to the caller's own descendants, and rejects steer and kill requests that target runs outside that descendant tree. The fix shipped in openclaw@2026.3.11.
Workarounds
Upgrade to 2026.3.11 or later.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | openclaw | < 2026.3.11 | 2026.3.11 |
References
- CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H- Weakness (CWE)
CWE-269- Platform
- npm
- Package
openclaw- Disclosed
- 13.03.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-4w7m-58cg-cmff - CC BY 4.0
Vulnerability history: openclaw
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 589
- First → latest
- 02.2026 10.2026
- Without a fix
- 9
- Exploited in attacks
- 0
Severity breakdown
- Critical 20
- High 215
- Medium 300
- Low 54
Disclosures per year
- 2026: 589
-
OpenClaw: Leaf subagents could steer sibling sessions across sandbox boundaries this entry
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