Openclaw cli: OpenClaw: Leaf subagents could steer sibling sessions across sandbox boundaries (CVE-2026-32915)
Description
OpenClaw CLI versions up to 2026.3.10 contain a vulnerability where sandboxed leaf subagents can bypass session boundaries and control sibling sessions. This allows a low-privilege sandboxed worker to steer or kill sibling runs owned by the same requester, potentially executing with broader tool policies. The issue is fixed in version 2026.3.11 by restricting subagent control access and enforcing descendant-only control scope.
CVSS v3.1
Score 8.8high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
In affected versions of openclaw (<= 2026.3.10), sandboxed leaf subagents retained access to the 'subagents' control interface and could issue control requests authorized against the parent requester scope rather than being confined to their own session tree. This flaw allowed a low-privilege sandboxed leaf worker to steer or kill sibling runs within the same requester scope, effectively bypassing sandbox and session boundaries. The vulnerability was addressed in [email protected] by removing 'subagents' control access from leaf subagents by default, scoping control requests to the caller's own descendants, and rejecting requests targeting runs outside that descendant tree.
Potential Impact
An attacker with low-privilege sandboxed access can manipulate sibling sessions owned by the same requester, potentially causing unauthorized execution with broader tool policies. This represents a sandbox and session-scope boundary bypass with high confidentiality, integrity, and availability impact as per the CVSS score.
Mitigation Recommendations
Upgrade to openclaw version 2026.3.11 or later, which removes subagent control access from leaf subagents by default and restricts control requests to the caller's own descendant sessions. This official fix fully mitigates the vulnerability.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BREW-openclaw-cli-CVE-2026-32915
- Osv Schema Version
- 1.7.3
- Ecosystems
- ["Homebrew"]
- Cvss Version
- 3.1
Threat ID: 6ac245da12601ec6a31680a8
Added to database: 10/04/2026, 12:26:02 UTC
Last enriched: 10/04/2026, 13:20:49 UTC
Last updated: 10/04/2026, 16:08:37 UTC
Views: 4
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