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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-fmxf-pm6p-7xgm async-http-client: Cookie header not stripped on cross-origin redirect
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 08 Jun 2026 18:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:asynchttpclient_project:async-http-client:*:*:*:*:*:*:*:*

Mon, 08 Jun 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sun, 07 Jun 2026 11:15:00 +0000

Type Values Removed Values Added
First Time appeared Asynchttpclient Project
Asynchttpclient Project async-http-client
Vendors & Products Asynchttpclient Project
Asynchttpclient Project async-http-client

Fri, 05 Jun 2026 20:15:00 +0000

Type Values Removed Values Added
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.
Title async-http-client: Cookie header not stripped on cross-origin redirect
Weaknesses CWE-200
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-08T16:34:10.203Z

Reserved: 2026-05-11T20:14:43.202Z

Link: CVE-2026-45300

cve-icon Vulnrichment

Updated: 2026-06-08T14:33:16.422Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-05T20:17:31.893

Modified: 2026-06-08T18:37:41.620

Link: CVE-2026-45300

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-07T11:00:11Z

Weaknesses