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[ CVE-2026-107285 · Published 7 Oct 2026 ]

AsyncHttpClient: WebSocket proxy credentials sent to the origin server over a CONNECT tunnel

CVSS 5.9 EPSS <1%Fix available

[ Description ]Official description

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.12 and 2.16.1, a proxied ws request is carried through CONNECT, but NettyRequestFactory.newNettyRequest and requestUri decide whether to attach proxy authentication and an absolute-form target only from whether the URI is secure. Because ws is not marked secure, the tunneled WebSocket upgrade sent to the origin includes the proxy's Proxy-Authorization value. Basic credentials are directly recoverable and Digest responses can be replayed or cracked offline. This issue is fixed in versions 3.0.12 and 2.16.1.

[ Fixes ]Fixes and patches

[ Packages ]Affected open-source packages

  • org.asynchttpclient:async-http-client mavenAffected >= 3.0.0, <= 3.0.11 · fixed in 3.0.12 · GHSA-3wp9-xfwm-rjjf
  • org.asynchttpclient:async-http-client mavenAffected >= 2.0.0, <= 2.16.0 · fixed in 2.16.1 · GHSA-3wp9-xfwm-rjjf

[ References ]References