Strip proxy-authorization header by default.#348
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proxy-authorization header by defaultproxy-authorization header by default.
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Pull request overview
This PR hardens Falcon’s proxy middleware by ensuring the Proxy-Authorization header is stripped before forwarding requests upstream, preventing unintended exposure of proxy credentials and aligning with RFC 7235 §4.4.
Changes:
- Add
proxy-authorizationto the proxy middleware’s hop-by-hop header removal list. - Add a middleware unit test verifying
proxy-authorizationis removed while preservingauthorization.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
lib/falcon/middleware/proxy.rb |
Strips proxy-authorization as a hop-by-hop header during header preparation. |
test/falcon/middleware/proxy.rb |
Adds coverage to ensure proxy-authorization is removed by default. |
ioquatix
approved these changes
May 27, 2026
ioquatix
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May 27, 2026
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Summary
Strip
Proxy-Authorizationin the proxy middleware before forwarding requests upstream.Forwarding the
Proxy-Authorizationit through Falcon's reverse proxy can expose proxy credentials to upstream applications that did not request them. It should also be stripped under RFC 7235 S4.4