Hub/AI Security/Advisories/GHSA-fmmv-w9g8-j3gc
HTTP server transports and OAuth endpoints read request bodies with no size limit
MCP Python SDK security advisory.
| GHSA | GHSA-fmmv-w9g8-j3gc |
|---|---|
| Published | Sep 30, 2026 |
| Severity | High 7.5 |
| CVE | CVE-2026-109527 |
| Status | patched |
| Affected | < 1.29.1, >= 2.0.0, < 2.1.0 |
| Fixed in | 1.29.1, 2.1.0 |
| 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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