Insufficiently protected credentials in Async-http-client - #VU142442
Published: August 13, 2026
Vulnerability identifier: #VU142442
CSH Severity: Medium
CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-522
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to insufficiently protected credentials in NettyRequestFactory#newNettyRequest and requestUri() when sending a WebSocket upgrade request through an HTTP CONNECT tunnel for ws:// requests. A remote attacker can observe a tunneled proxied ws:// connection or operate the origin server to disclose sensitive information.
Proxy credentials may be exposed directly for Basic authentication, or as a replayable and offline-crackable response for Digest authentication.
Affected software
Async-http-client
Remediation
Install security update from vendor's website.
Async-http-client - addressed in versions 2.16.1, 3.0.12