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OpenAdvisories
Medium · 5.9 CVE-2026-107285 EUVD-2026-94645GHSA-3wp9-xfwm-rjjf

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

Published Oct 7, 2026 · Updated Oct 8, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
AsyncHttpClient async-http-client >= 3.0.0, <3.0.12, >= 2.0.0, < 2.16.1 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 12 async-http-client No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu 26.10 async-http-client No fix yet —
Ubuntu 26.04 LTS async-http-client No fix yet —
Ubuntu 24.04 LTS async-http-client No fix yet —
Ubuntu 22.04 LTS async-http-client No fix yet —
Ubuntu 18.04 LTS async-http-client No fix yet —
Show 3 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS async-http-client No fix yet —
Ubuntu Pro 20.04 LTS async-http-client No fix yet —
Ubuntu Pro 14.04 LTS async-http-client No fix yet —

Affected packages

EcosystemPackageAffectedFixedRecord
Maven org.asynchttpclient:async-http-client >= 3.0.0, < 3.0.12 3.0.12 GHSA-3wp9-xfwm-rjjf
Maven org.asynchttpclient:async-http-client >= 2.0.0, < 2.16.1 2.16.1 GHSA-3wp9-xfwm-rjjf

References