Echo: async-http-client, org.asynchttpclient:async-http-client: security update to 2.16.1

medium Tenable Cloud Security Plugin ID 455341

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

- The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and
asynchronously process HTTP responses. From 2.0.0 until 2.16.1 and 3.0.12, a request using an HTTP proxy
to reach an HTTPS origin can expose preemptive origin credentials because NettyRequestFactory and
NettyRequestSender.sendRequestWithNewChannel attach Authorization to the plaintext CONNECT request before
the TLS tunnel exists. Basic or Digest credentials and per-connection NTLM, Kerberos, or SPNEGO tokens
intended for the origin are therefore visible to the proxy and to observers on the client-to-proxy hop.
The tunneled request still receives origin Authorization after the tunnel is established, while Proxy-
Authorization remains on CONNECT for its intended proxy recipient. This issue is fixed in versions 2.16.1
and 3.0.12. (CVE-2026-85720)

Solution

Update the async-http-client library and its related packages to version 2.16.1 or later.

Plugin Details

Severity: Medium

ID: 455341

Version: Revision 1.2

Type: Local

Family: Echo Local Security Checks

Published: 10/1/2026

Updated: 10/3/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.57

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2026-85720

CVSS v3

Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.2

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 9/28/2026

Vulnerability Publication Date: 9/17/2026

Reference Information

CVE: CVE-2026-85720

Detections

Analytics