CVE-2026-45300
HighCVSS 7.4Summary
The AsyncHttpClient (AHC) library in versions 2.x prior to 2.15.0 and 3.x prior to 3.0.10 leaks `Cookie` headers during redirects to different origins. The `propagatedHeaders()` method does not strip the `Cookie` header, leading to session cookies being sent to attacker-controlled servers.
Risk Assessment
The leakage of `Cookie` headers may lead to session hijacking and exposure of other sensitive data, posing a serious security threat to applications and users.
Recommendation
It is recommended to update the AsyncHttpClient library to version 2.15.0 or 3.0.10 to mitigate this vulnerability.
Original NVD description (English source)
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Versions on the 2.x branch prior to 2.15.0 and the 3.x branch prior to 3.0.10 leak `Cookie` headers to cross-origin redirect targets. When following a redirect to a different origin, the `propagatedHeaders()` method in `Redirect30xInterceptor.java` strips `Authorization` and `Proxy-Authorization` headers but does not strip the `Cookie` header, causing session cookies and other sensitive cookie values to be sent to attacker-controlled servers. Versions 2.15.0 and 3.0.10 patch the issue.