CVE-2026-45300
Description
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.
How to fix
- asynchttpclient_project async-http-client2.15.0, 3.0.10 or later
- org.asynchttpclient:async-http-client3.0.10, 2.15.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| asynchttpclient_project async-http-client | 2.0.0 ≤ v < 2.15.0, 3.0.0 ≤ v < 3.0.10 | 2.15.0, 3.0.10 |
| org.asynchttpclient:async-http-clientMaven | 3.0.0.Beta1 ≤ v < 3.0.10, 2.0.0 ≤ v < 2.15.0 | 3.0.10, 2.15.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.