CVE-2026-85717 AsyncHttpClient: Client-wide realm credentials re-sent to a cross-origin redirect target
AsyncHttpClient leaks client-wide credentials to cross-origin redirect targets when configured with a global realm and redirect following.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-85717?
CVE-2026-85717 is a medium-severity vulnerability in AsyncHttpClient async-http-client, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-85717?
4 open source packages ship an affected version, including org.asynchttpclient:async-http-client.
| Package | Affected | Fixed in |
|---|---|---|
org.asynchttpclient:async-http-client Maven | From 2.14.5 | 2.16.1 |
org.asynchttpclient:async-http-client Maven | From 2.14.5 | 2.16.1 |
org.asynchttpclient:async-http-client Maven | From 3.0.9 | 3.0.12 |
org.asynchttpclient:async-http-client Maven | From 3.0.9 | 3.0.12 |
How do I fix CVE-2026-85717?
Upgrade org.asynchttpclient:async-http-client to a fixed version for your release line: 2.16.1 or 3.0.12.
Is CVE-2026-85717 being exploited?
There is no known exploitation of CVE-2026-85717 in the wild and no public exploit code.
Sources
Also known as ECHO-7764-b5b5-9fbb, GHSA-f8m2-889x-vw4x, MINI-922h-r7vp-fph3, MINI-g37c-928q-vjx3, MINI-qhhj-xprf-wmpc, MINI-xvjh-6ppq-32hg and 1 more.