async-http-client: Cookie header not stripped on cross-origin redirect_CVE-2026-45300

7.4 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

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.

Basic Information

ID CVE-2026-45300

Source GitHub_M

Published Jun 5, 2026 at 19:32

Affected Product

Vendor AsyncHttpClient

Product async-http-client

Version >= 3.0.0.Beta1, < 3.0.10

Affected Versions AsyncHttpClient async-http-client >= 3.0.0.Beta1, < 3.0.10
AsyncHttpClient async-http-client >= 2.0.0, < 2.15.0

CWE Classification

CWE-200

References

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    "published": "2026-06-05T19:32:43.547Z",
    "modified": "2026-06-05T19:32:43.547Z",
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