CVE-2026-85717

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.14.5 to 2.16.0 and from 3.0.9 to 3.0.11, a client configured with a client-wide Realm and redirect following can disclose credentials after a cross-origin redirect because the Interceptors authentication path falls back to the client configuration after redirect handling clears the per-exchange realm. If the attacker-controlled target returns 401, the client can send Basic or Digest credentials or a Negotiate or NTLM token to that origin. Per-request realms are stripped correctly, and this issue is a residual bypass of the earlier cross-origin credential-stripping fixes. This issue is fixed in versions 2.16.1 and 3.0.12.

• https://github.com/AsyncHttpClient/async-http-client/commit/43db7bba81430cbd61ec2dc2c7be464e0ff6a0ff
• https://github.com/AsyncHttpClient/async-http-client/commit/b66757bec34def2e9867bb2b77bd848b1112abb4
• https://github.com/AsyncHttpClient/async-http-client/pull/2224
• https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-f8m2-889x-vw4x