Information disclosure in Async-http-client - #VU125944
Published: April 14, 2026
Vulnerability identifier: #VU125944
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Asynchttpclient Project
Affected software:
Async-http-client
Async-http-client
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to exposure of sensitive information in redirect handling when following cross-origin redirects. A remote attacker can control a redirect target to disclose sensitive information.
The issue can leak Authorization and Proxy-Authorization headers as well as Realm credentials, including during HTTPS-to-HTTP downgrades. Even when authorization stripping is enabled, plaintext Realm credentials may still be propagated and regenerated for Basic and Digest authentication schemes.
Remediation
Install security update from vendor's website.