OpenClaw before 2026.4.20 contains an improper environment variable validation vulnerability in MCP stdio server configuration that allows attackers to execute arbitrary code. Malicious workspace configurations can pass dangerous startup variables like NODE_OPTIONS, LD_PRELOAD, or BASH_ENV to spawned MCP server processes, enabling code injection when operators start sessions using those servers.
History

Mon, 11 May 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 11 May 2026 17:30:00 +0000

Type Values Removed Values Added
Description OpenClaw before 2026.4.20 contains an improper environment variable validation vulnerability in MCP stdio server configuration that allows attackers to execute arbitrary code. Malicious workspace configurations can pass dangerous startup variables like NODE_OPTIONS, LD_PRELOAD, or BASH_ENV to spawned MCP server processes, enabling code injection when operators start sessions using those servers.
Title OpenClaw < 2026.4.20 - Arbitrary Code Execution via MCP stdio Environment Variables
First Time appeared Openclaw
Openclaw openclaw
Weaknesses CWE-829
CPEs cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
Vendors & Products Openclaw
Openclaw openclaw
References
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 5.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-05-11T17:57:02.478Z

Reserved: 2026-05-08T16:41:39.934Z

Link: CVE-2026-44995

cve-icon Vulnrichment

Updated: 2026-05-11T17:56:49.317Z

cve-icon NVD

Status : Received

Published: 2026-05-11T18:16:39.387

Modified: 2026-05-11T18:16:39.387

Link: CVE-2026-44995

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-11T18:45:25Z