CVE-2026-85719

Name	CVE-2026-85719
Description	The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.1.0 until 2.16.1 and 3.0.12, requests using an authenticated SOCKS proxy can expose the proxy's credentials to the origin because NettyRequestFactory and NettyRequestSender attach Proxy-Authorization without confirming that the request is being sent to an HTTP proxy. With preemptive proxy authentication, the header is attached to a plaintext HTTP request, exposing credentials such as directly reversible Basic credentials to the origin. With the default non-preemptive flow, a hostile origin can return a 407 response and ProxyUnauthorized407Interceptor sends the proxy credentials through the existing SOCKS tunnel, including NTLM, Kerberos, and SPNEGO credentials. Releases before 2.1.0 lack SOCKS proxy support. This issue is fixed in versions 2.16.1 and 3.0.12.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
async-http-client (PTS)	bookworm (security)	2.12.3-1+deb12u1	vulnerable
	sid, bookworm	2.12.3-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
async-http-client	source	(unstable)	(unfixed)

Notes

https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-x5w6-vm3f-pp6f
Fixed by: https://github.com/AsyncHttpClient/async-http-client/commit/718ed2e86126663a88ea3db7a88cbbf93f0069b5 (async-http-client-project-2.16.1)
Fixed by: https://github.com/AsyncHttpClient/async-http-client/commit/abaa8bd260beda3b85825ff95069ed11eaf4ca8d (async-http-client-project-2.16.1)
Fixed by: https://github.com/AsyncHttpClient/async-http-client/commit/4d887704dec22027310f66c81503226722e9bd23 (async-http-client-project-3.0.12)
Fixed by: https://github.com/AsyncHttpClient/async-http-client/commit/be439b2ec773d12d61914c238d3e8eeaa6f0ba21 (async-http-client-project-3.0.12)