GHSA-8q49-2h5h-434x: FrontMCP: Server-Side Request Forgery (SSRF) in the OpenAPI adapter spec-change poller

The OpenAPI adapter’s spec-change poller (OpenApiSpecPoller) re-fetched the configured spec url on a timer using a raw global fetch(), bypassing the SSRF guard (safeFetch / assertUrlSafe) that OpenAPIToolGenerator.fromURL() applies to the initial spec load. As a result, the pinning/DNS-resolution hardening delivered via mcp-from-openapi >= 2.5.0 (advisory GHSA-65h7-9wrw-629c) protected the initial load but not the recurring poll of the same URL. When polling is enabled against an untrusted or attacker-influenceable spec URL, this is an unguarded SSRF vector.