Cleartext Transmission of Sensitive Information Affecting org.asynchttpclient:async-http-client package, versions [,2.16.1)[3.0.0.Beta1,3.0.12)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published20 Sept 2026
- disclosed17 Sept 2026
- credithyperxpro
Introduced: 17 Sep 2026
NewCVE-2026-85719 (opens in a new tab)How to fix?
Upgrade org.asynchttpclient:async-http-client to version 2.16.1, 3.0.12 or higher.
Overview
org.asynchttpclient:async-http-client is a maven plugin for the Async Http Client (AHC) classes.
Affected versions of this package are vulnerable to Cleartext Transmission of Sensitive Information through proxy-auth handling in NettyRequestFactory.newNettyRequest and NettyRequestSender.writeRequest. An attacker can steal proxy credentials by causing the client to send a Proxy-Authorization header on a request routed through a SOCKS proxy, where the request is tunneled directly to the origin server instead of the proxy. When preemptive proxy authentication is enabled, the origin receives the proxy credentials on the initial request; when it is not, a hostile origin can return 407 Proxy Authentication Required and the client will answer with the proxy’s credentials over the same tunnel. This exposes Basic credentials in plaintext and can also disclose NTLM, Kerberos, or SPNEGO proxy authentication material to the origin and anyone observing traffic on that side of the connection.
Workarounds
- Do not configure proxy authentication on a SOCKS proxy.