---
id: CVE-2026-107281
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. Prior to 3.0.13 and
  2.16.1, the HTTP/1.1 connection-pool key excludes the authenticated principal
  for c…
severity: high
cvss: 7.6
cvssVector: 'CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-346
  - CWE-863
vendor: AsyncHttpClient
product: async-http-client
affected:
  - 'async-http-client >= 3.0.0, < 3.0.13'
  - 'async-http-client >= 2.0.0, < 2.16.1'
published: '2026-10-07'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T22:17:03.980'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107281'
references:
  - url: >-
      https://github.com/AsyncHttpClient/async-http-client/commit/73813babf51231ee79f7da4f07b777f19f48d34d
    label: security-advisories@github.com
  - url: >-
      https://github.com/AsyncHttpClient/async-http-client/commit/83e552e64cabab2119addb6b47f7c6482997c94e
    label: security-advisories@github.com
  - url: >-
      https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-2.16.1
    label: security-advisories@github.com
  - url: >-
      https://github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-client-project-3.0.13
    label: security-advisories@github.com
  - url: >-
      https://github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-vvp4-63h8-v5pm
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-07T21:54:15.105Z'
---

## Overview

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. Prior to 3.0.13 and 2.16.1, the HTTP/1.1 connection-pool key excludes the authenticated principal for connection-oriented NTLM and Negotiate authentication. A pooled socket authenticated for one request can be reused by a request carrying another principal, and the server executes that later request as the first identity. Basic and Digest are not affected because they authenticate each request. This issue is fixed in versions 3.0.13 and 2.16.1.

## Remediation

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