External Control of System or Configuration Setting in OpenClaw - CVE-2026-4039
Published: May 1, 2026
Vulnerability identifier: #VU128846
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-4039
CWE-ID: CWE-15
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 influence runtime or child-process behavior.
The vulnerability exists due to external control of system or configuration setting in applySkillConfigEnvOverrides when copying skills.entries.*.env values into the host process environment. A local user can modify local OpenClaw state or configuration to inject dangerous environment variables and influence runtime or child-process behavior.
Dangerous process-level variables such as NODE_OPTIONS may be injected when they are unset.
How to mitigate CVE-2026-4039
Install security update from vendor's website.