Information disclosure in Async-http-client - CVE-2026-45300
Published: May 13, 2026
Vulnerability identifier: #VU131339
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-45300
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 Redirect30xInterceptor.java when following a cross-origin redirect or an HTTPS-to-HTTP downgrade. A remote attacker can trigger a redirect to an attacker-controlled target to disclose sensitive information.
User interaction is required to initiate the request that follows the redirect.
How to mitigate CVE-2026-45300
Install security update from vendor's website.