A MCP server providing weather, snow conditions, and air quality tools via the Open-Meteo API.
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schlpbch
Source: github_code
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Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard
Hono: Path traversal in toSSG() allows writing files outside the output directory
Hono missing validation of cookie name on write path in setCookie()
Hono: app.mount() strips mount prefix using undecoded path, causing incorrect routing for percent-encoded paths
Hono: Cookie helper does not sanitize sameSite and priority, allowing Set-Cookie injection
Tool annotations
No tools have read-only/destructive annotations
Add readOnlyHint or destructiveHint annotations to every tool so hosts can warn users before invoking.
All four hints declared on every tool
11/11 tools missing one or more hints — meteo__get_weather (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); meteo__get_snow_conditions (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint); meteo__search_location (missing: readOnlyHint, destructiveHint, idempotentHint, openWorldHint), +8 more. OpenAI's directory rejects tools where any of the four hints are missing or non-boolean.
For every tool, set all four hints (readOnlyHint, destructiveHint, idempotentHint, openWorldHint) to explicit true/false values that match the handler’s actual behaviour.
Production dependencies are patched
0 critical, 1 high severity in production deps — hono@4.12.9 (high), hono@4.12.9 (medium)
Run npm audit fix, or upgrade the affected packages to a non-vulnerable version.
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