Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/AsyncHttpClient/async-http-client/commit/4d887704dec22027310f
- https://github.com/AsyncHttpClient/async-http-client/commit/718ed2e86126663a88ea
- https://github.com/AsyncHttpClient/async-http-client/commit/abaa8bd260beda3b8582
- https://github.com/AsyncHttpClient/async-http-client/commit/be439b2ec773d12d6191
- https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-x5
FAQ
What is CVE-2026-85719?
CVE-2026-85719 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 authenticate...
How severe is CVE-2026-85719?
CVE-2026-85719 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-85719?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.