| Component | OpenClaw |
| Severity | high (CVSS 7.3) |
| CVSS vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H |
| Published (NVD) | 2026-05-11 |
| Last modified | 2026-06-17 |
| Affected versions | openclaw < 2026.4.20 |
| Fixed in | 2026.4.20 |
| Weakness | CWE-829 |
| CISA KEV | not listed |
NVD 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.
What to do
- Upgrade OpenClaw to
2026.4.20or later. - Do not expose the component's API or UI to the internet without authentication in front of it.
Sources
- NVD: CVE-2026-44995
- https://github.com/openclaw/openclaw/commit/62fa5071896e95edc7f67d1cebc70a2859e283af
- https://www.vulncheck.com/advisories/openclaw-arbitrary-code-execution-via-mcp-stdio-environment-variables
- https://github.com/openclaw/openclaw/security/advisories/GHSA-mj59-h3q9-ghfh
- https://github.com/openclaw/openclaw/commit/85d86ebc4bf3d2226d39d132a484f4f7a299fa1b
Read more
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