CVSS 4.0
5.4 mediumCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:NCVE-2026-44995
Medium (5.4) in openclaw openclaw. EPSS 0.1% chance of exploitation in the next 30 days. Fixed in openclaw 2026.4.20.
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.
Severity
CVSS 3.1
7.3 highCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H- EPSS
- 0.1% chance of exploitation in the next 30 days; higher than 3% of CVEs (scores of 2026-10-31)
- CWE
- CWE-829
- Published
- Modified
- Record from
- the NVD, synced
Affected
- openclaw:openclaw
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-mj59-h3q9-ghfh | npm | openclaw | <2026.4.20 | 2026.4.20 |
References
- https://github.com/openclaw/openclaw/commit/62fa5071896e95edc7f67d1cebc70a2859e283af
- https://github.com/openclaw/openclaw/commit/85d86ebc4bf3d2226d39d132a484f4f7a299fa1b
- https://github.com/openclaw/openclaw/security/advisories/GHSA-mj59-h3q9-ghfh
- https://www.vulncheck.com/advisories/openclaw-arbitrary-code-execution-via-mcp-stdio-environment-variables