CVE-2026-107285 AsyncHttpClient: WebSocket proxy credentials sent to the origin server over a CONNECT tunnel
AsyncHttpClient leaks proxy credentials to origin servers during WebSocket connections, allowing attackers to recover or replay authentication data.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-107285?
CVE-2026-107285 is a medium-severity vulnerability in AsyncHttpClient async-http-client, published on 7 Oct 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. 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.
Which versions are affected by CVE-2026-107285?
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 2.0.0 | 2.16.1 |
org.asynchttpclient:async-http-client Maven | From 2.0.0 | 2.16.1 |
org.asynchttpclient:async-http-client Maven | From 3.0.0 | 3.0.12 |
org.asynchttpclient:async-http-client Maven | From 3.0.0 | 3.0.12 |
How do I fix CVE-2026-107285?
Upgrade org.asynchttpclient:async-http-client to a fixed version for your release line: 2.16.1 or 3.0.12.
Is CVE-2026-107285 being exploited?
There is no known exploitation of CVE-2026-107285 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-107285, ECHO-d74c-6231-875e, GHSA-3wp9-xfwm-rjjf, MINI-4rvw-jj9j-cccm, MINI-phmx-4gpx-c53x, MINI-q6ff-r5qp-pr57 and 2 more.