Time-of-check Time-of-use (TOCTOU) Race Condition in OpenClaw - #VU127181
Published: April 23, 2026
Vulnerability identifier: #VU127181
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: N/A
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: OpenClaw
Affected software:
OpenClaw
OpenClaw
Detailed vulnerability description
The vulnerability allows a local user to write files outside the intended sandbox mount root.
The vulnerability exists due to a time-of-check time-of-use race condition in the OpenShell filesystem bridge write path when handling filesystem writes. A local user can swap a symlink between the check and the write to write files outside the intended sandbox mount root.
Remediation
Install security update from vendor's website.