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.
Published: 2026-10-07
Score: 5.9 Medium
EPSS: < 1% Very Low
KEV: No
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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-3wp9-xfwm-rjjf AsyncHttpClient: WebSocket proxy credentials sent to the origin server over a CONNECT tunnel
History

Fri, 09 Oct 2026 07:45:00 +0000

Type Values Removed Values Added
First Time appeared Asynchttpclient Project
Asynchttpclient Project async-http-client
Vendors & Products Asynchttpclient Project
Asynchttpclient Project async-http-client

Thu, 08 Oct 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 07 Oct 2026 21:45:00 +0000

Type Values Removed Values Added
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.
Title AsyncHttpClient: WebSocket proxy credentials sent to the origin server over a CONNECT tunnel
Weaknesses CWE-319
CWE-522
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}


Subscriptions

Asynchttpclient Project Async-http-client
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-08T17:57:33.271Z

Reserved: 2026-10-07T15:53:23.586Z

Link: CVE-2026-107285

cve-icon Vulnrichment

Updated: 2026-10-08T15:26:08.052Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-07T22:17:04.637

Modified: 2026-10-08T20:35:31.200

Link: CVE-2026-107285

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-09T07:30:17Z

Weaknesses
  • CWE-319

    Cleartext Transmission of Sensitive Information

  • CWE-522

    Insufficiently Protected Credentials