Hub/AI Security/Advisories/GHSA-rwrf-2pqf-9j8j
Client fetched server-chosen $ref URLs while validating tool results against output schemas
MCP Python SDK security advisory.
| GHSA | GHSA-rwrf-2pqf-9j8j |
|---|---|
| Published | Sep 28, 2026 |
| Severity | Medium 6.5 |
| CVE | CVE-2026-116686 |
| Status | patched |
| Affected | >= 2.0.0, < 2.2.0, >= 1.10.0, < 1.30.0 |
| Fixed in | 2.2.0, 1.30.0 |
| Component | MCP Python SDK |
Sources
Checked 2026-11-04. We copy severity and fix versions from the source and never estimate them.
Affected tools
Weekly, free
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