Improper Authentication in Async-http-client - #VU152427
Published: September 28, 2026
Vulnerability identifier: #VU152427
CSH Severity: Low
CVSS v4: 7.6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to access and act under another user's session.
The vulnerability exists due to improper authentication in CookieStore handling of Cookie headers when an application shares a client and its cookie store among users while setting session cookies with setHeader or addHeader. A remote user can cause a request to be sent with a cookie from another user's session to access or act under another user's session.
The cookie store is enabled by default.
Affected software
Async-http-client
Remediation
Install security update from vendor's website.
Async-http-client - update to 3.0.14