HIGH 8.2 NVD
CVE-2026-77711
When Jetty's `HttpClient` make a request to a server through a forward proxy, the server may reply with a 407 (Proxy Authentication Required). The client mis
When Jetty's `HttpClient` make a request to a server through a forward proxy, the server may reply with a 407 (Proxy Authentication Required).
The client mistakenly interprets the 407 as coming from the proxy, so it re-sends the request with the `Proxy-Authentication` header, which arrives to the server, that now has access to the proxy credentials.
References
- https://github.com/jetty/jetty.project/security/advisories/GHSA-r2c5-3p8g-wpvw
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/238
- https://github.com/jetty/jetty.project/security/advisories/GHSA-r2c5-3p8g-wpvw
This high severity vulnerability with a CVSS score of 8.2 was published on 2026-10-15 via NVD.
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