Hub/AI Security/Advisories/GHSA-4fc4-wcmh-4g86
Malicious MCP OAuth callback can switch transport to stdio and execute arbitrary local commands (RCE)
MCP Inspector security advisory.
| GHSA | GHSA-4fc4-wcmh-4g86 |
|---|---|
| Published | Oct 21, 2026 |
| Severity | Critical 9.6 |
| CVE | None assigned |
| Status | patched |
| Affected | >= 0.13.0, <= 1.0.2, >= 0.13.0, <= 1.0.2 |
| Fixed in | 1.0.3, 1.0.3 |
| Component | MCP Inspector |
Sources
Checked 2026-11-04. We copy severity and fix versions from the source and never estimate them.
Affected tools
Weekly, free
What changed in AI integrations
One short email when MCP clients, plugin ecosystems, IDE integrations, AI plan prices or security advisories change. Every item is sourced.