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eeee2345/advisory-improvement-10851
November 2, 2026 17:42
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GHSA-rcfx-77hg-w2wv (fastmcp < 2.14.0) has an empty
cwe_ids. This adds CWE-1395, Dependency on Vulnerable Third-Party Component.The advisory's own details say FastMCP "does not use any of the affected components of the MCP SDK directly" and that the issue is that versions before 2.14.0 allowed
mcp< 1.23.0, which is affected by CVE-2025-66416 (GHSA-9h52-p55h-vw2f). So the weakness in fastmcp itself is the dependency range rather than the upstream DNS rebinding defaults, and I did not copy the upstream advisory's CWE-350 and CWE-1188.CWE-1395 is already used for this pattern in reviewed advisories, for example GHSA-wq5f-xc86-pv6w (sharp, vulnerability in the bundled librsvg).
Sources:
Only
database_specific.cwe_idschanges. cc @jlowin since the advisory came from the fastmcp repository.