CVE-2026-45300: high-severity vulnerability in AsyncHttpClient async-http-client
async-http-client: Cookie header not stripped on cross-origin redirect
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.4epss 0.4%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N
Affected products
AsyncHttpClient · async-http-clientRelated CVEs — AsyncHttpClient async-http-client
In the same product, most dangerous first.
CVE-2024-53990CRITICALAsyncHttpClient (AHC) library's `CookieStore` replaces explicitly defined `Cookie`sEPSS 0.7%CVE-2026-85721HIGHAsyncHttpClient: Unbounded HTTP/1.1 response decompression enables a decompression-bomb denial of serviceEPSS 0.6%CVE-2026-85718MEDIUMAsyncHttpClient: Connection permit leak on TLS handshake failure causes per-host denial of serviceEPSS 0.5%CVE-2026-85717MEDIUMAsyncHttpClient: Client-wide realm credentials re-sent to a cross-origin redirect targetEPSS 0.5%CVE-2026-107227HIGHAsyncHttpClient: Unbounded WebSocket permessage-deflate decompression enables a decompression-bomb denial of service when compression is enabledEPSS 0.4%CVE-2026-40490MEDIUMAsyncHttpClient leaks authorization credentials to untrusted domains on cross-origin redirectsEPSS 0.4%