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CVE-2026-77711

8.2 high SSVC exploitation: poc Awaiting Analysis
NVD · CVE.org

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.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 2

  1. StatusReceived → Awaiting AnalysisNVD modified 2026-10-15 14:41
  2. First seenCVSS 8.2NVD modified 2026-10-15 09:17

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3