---
id: CVE-2026-107228
title: >-
  The AsyncHttpClient (AHC) library allows Java applications to easily execute
  HTTP requests and asynchronously process HTTP responses
summary: >-
  The AsyncHttpClient (AHC) library allows Java applications to easily execute
  HTTP requests and asynchronously process HTTP responses. From 2.1.0 until
  3.0.14, the enabled-by-default cookie store replaces a Cookie header
  explicitly suppli…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-287
vendor: AsyncHttpClient
product: async-http-client
affected:
  - 'async-http-client >= 3.0.0, < 3.0.14'
  - 'async-http-client >= 2.1.0, <= 2.16.1'
published: '2026-10-07'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T21:17:14.457'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107228'
references:
  - url: >-
      https://github.com/AsyncHttpClient/async-http-client/commit/fd9763620725126c1c8bb0af1ceb9a7523099a5f
    label: security-advisories@github.com
  - url: >-
      https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.14
    label: security-advisories@github.com
  - url: >-
      https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-2jwh-9rmr-j4xf
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-07T21:54:15.091Z'
---

## Overview

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.1.0 until 3.0.14, the enabled-by-default cookie store replaces a Cookie header explicitly supplied through setHeader or addHeader whenever the store contributes any cookie for the origin. In a shared client, stored cookies originating from one user can replace a different user's request cookie, causing the request to execute under the wrong session. This bypasses the earlier CVE-2024-53990 remediation, which covered cookies supplied through addCookie but not a directly supplied header. This issue is fixed in version 3.0.14.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.