fastify-http-proxy is an npm package which is a fastify plugin for proxying your http requests to another server, with hooks. By crafting a specific URL, it is possible to escape the prefix of the proxied backend service. If the base url of the proxied server is `/pub/`, a user expect that accessing `/priv` on the target service would not be possible. In affected versions, it is possible. This is fixed in version 4.3.1.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| fastify-http-proxy(npm) | 0 | 4.3.1 | N/A |
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