CVE-2026-85717: Exposure of Sensitive Information to an Unauthorized Actor

The AsyncHttpClient AHC library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.14.5 to 2.16.0 and from 3.0.9 to 3.0.11, a client configured with a client-wide Realm and redirect following can disclose credentials after a cross-origin...

GHSA-M452-Q8C9-RG2F AsyncHttpClient stores cookie for an unrelated domain (cookie tossing) via ThreadSafeCookieStore

Impact A cookie tossing / cookie injection issue CWE-1275. ThreadSafeCookieStore stored a cookie under the value of its Domain attribute without verifying that the responding host is allowed to set a cookie for that domain RFC 6265 §5.3 step 6. A host the client connects to can therefore plant a...

EUVD-2026-41134

AsyncHttpClient stores cookie for an unrelated domain cookie tossing via ThreadSafeCookieStore...

AsyncHttpClient stores cookie for an unrelated domain (cookie tossing) via ThreadSafeCookieStore

Impact A cookie tossing / cookie injection issue CWE-1275. ThreadSafeCookieStore stored a cookie under the value of its Domain attribute without verifying that the responding host is allowed to set a cookie for that domain RFC 6265 §5.3 step 6. A host the client connects to can therefore plant a...

USN-8655-1: AsyncHttpClient vulnerability

It was discovered that AsyncHttpClient did not properly verify that the responding host was allowed to set cookies for a given domain in its ThreadSafeCookieStore. An attacker could use this to plant cookies scoped to unrelated domains, which would then be sent on later requests to those domains...

USN-8655-1 async-http-client vulnerability

It was discovered that AsyncHttpClient did not properly verify that the responding host was allowed to set cookies for a given domain in its ThreadSafeCookieStore. An attacker could use this to plant cookies scoped to unrelated domains, which would then be sent on later requests to those domains...

Linux Distros Unpatched Vulnerability : CVE-2026-55688

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - The AsyncHttpClient AHC library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. In versions from 2.0.0 prior...

UBUNTU-CVE-2026-55688

The AsyncHttpClient AHC library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. In versions from 2.0.0 prior to 2.16.0 and from 3.0.0.Beta1 prior to 3.0.11, ThreadSafeCookieStore stored a cookie under the value of its Domain attribute without...

PT-2026-54858

Name of the Vulnerable Software and Affected Versions AsyncHttpClient versions 2.0.0 through 2.15.9 AsyncHttpClient versions 3.0.0.Beta1 through 3.0.10 Description The ThreadSafeCookieStore component fails to verify if a responding host is authorized to set a cookie for a specific domain before...

CVE-2026-55688: Sensitive Cookie with Improper SameSite Attribute

The AsyncHttpClient AHC library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. In versions from 2.0.0 prior to 2.16.0 and from 3.0.0.Beta1 prior to 3.0.11, ThreadSafeCookieStore stored a cookie under the value of its Domain attribute without...

Improper Handling of Highly Compressed Data (Data Amplification)

Overview tornado is a Python web framework and asynchronous networking library, originally developed at FriendFeed. Affected versions of this package are vulnerable to Improper Handling of Highly Compressed Data Data Amplification in the AsyncHTTPClient. An attacker can cause excessive memory...

DEBIAN-CVE-2026-45300

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...

CVE-2026-45300

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...

CVE-2026-45300

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...

CVE-2026-45300

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...

CVE-2026-45300

CVE-2026-45300 affects AsyncHttpClient: vulnerable in the 2.x branch before 2.15.0 and the 3.x branch before 3.0.10. When following cross-origin redirects, propagatedHeaders() strips Authorization and Proxy-Authorization but leaves Cookie intact, causing session cookies and other sensitive cookie...

CVE-2026-45300

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...

Async Http Client 信息泄露漏洞

Async Http Client is an open-source Java-based asynchronous HTTP and WebSocket client library developed by AsyncHttpClient. Versions prior to 2.15.0 and 3.0.10 of AsyncHttpClient have a vulnerability related to information leakage. This vulnerability arises from the fact that the propagateHeaders...

CVE-2026-45300: Exposure of Sensitive Information to an Unauthorized Actor

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...

CVE-2026-40490

A flaw was found in AsyncHttpClient. When redirect following is enabled, the library improperly forwards Authorization and Proxy-Authorization headers, including Realm credentials, to arbitrary redirect targets regardless of domain, scheme, or port changes. An attacker who controls a redirect...