GHSA-mj59-h3q9-ghfh — MEDIUM AI Security Vulnerability

Q: What is GHSA-mj59-h3q9-ghfh?

OpenClaw: MCP stdio server env could load dangerous startup variables from workspace config

Q: Is GHSA-mj59-h3q9-ghfh actively exploited?

No confirmed active exploitation of GHSA-mj59-h3q9-ghfh has been reported, but organizations should still patch proactively.

Q: How to fix GHSA-mj59-h3q9-ghfh?

Update to patched version: openclaw 2026.4.20.

Q: What is the CVSS score for GHSA-mj59-h3q9-ghfh?

No CVSS score has been assigned yet.

## Affected Packages / Versions - Package: `openclaw` (npm) - Affected versions: `< 2026.4.20` - Patched version: `2026.4.20` ## Impact Workspace MCP stdio configuration could pass dangerous process-startup environment variables such as `NODE_OPTIONS`, `LD_PRELOAD`, or `BASH_ENV` to the spawned...

Full CISO analysis pending enrichment.

Affected Systems

Package	Ecosystem	Vulnerable Range	Patched
openclaw	npm	< 2026.4.20	`2026.4.20`
2 dependents 93% patched ~1d to patch Full package profile →

Do you use openclaw? You're affected.

Severity & Risk

CVSS 3.1

N/A

EPSS

N/A

Exploitation Status

No known exploitation

Sophistication

N/A

Recommended Action

Patch available

Update openclaw to version 2026.4.20

Compliance Impact

Compliance analysis pending. Sign in for full compliance mapping when available.

Frequently Asked Questions

What is GHSA-mj59-h3q9-ghfh?

OpenClaw: MCP stdio server env could load dangerous startup variables from workspace config

Is GHSA-mj59-h3q9-ghfh actively exploited?

No confirmed active exploitation of GHSA-mj59-h3q9-ghfh has been reported, but organizations should still patch proactively.

How to fix GHSA-mj59-h3q9-ghfh?

Update to patched version: openclaw 2026.4.20.

What is the CVSS score for GHSA-mj59-h3q9-ghfh?

No CVSS score has been assigned yet.

Technical Details

NVD Description

## Affected Packages / Versions - Package: `openclaw` (npm) - Affected versions: `< 2026.4.20` - Patched version: `2026.4.20` ## Impact Workspace MCP stdio configuration could pass dangerous process-startup environment variables such as `NODE_OPTIONS`, `LD_PRELOAD`, or `BASH_ENV` to the spawned MCP server process. In a malicious workspace, this could make the MCP child load attacker-controlled code when the operator starts a session that uses that MCP server. The impact is limited to local/workspace trust boundaries and requires the operator to run OpenClaw in a workspace containing the malicious MCP configuration. Severity is therefore medium, not high/critical. ## Fix OpenClaw now filters MCP stdio environment entries through the host environment safety denylist before spawning stdio MCP servers. Fix commits: - `62fa5071896e95edc7f67d1cebc70a2859e283af` - `85d86ebc4bf3d2226d39d132a484f4f7a299fa1b` ## Release Fixed in OpenClaw `2026.4.20`.