---
id: CVE-2026-107279
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. In 3.0.12, a peer
  offering only Digest qop=auth-int causes mutual-authentication verification to
  be ski…
severity: high
cvss: 8.8
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N'
cwe:
  - CWE-303
  - CWE-757
vendor: AsyncHttpClient
product: async-http-client
affected:
  - async-http-client = 3.0.12
published: '2026-10-07'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T22:17:03.657'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107279'
references:
  - url: >-
      https://github.com/AsyncHttpClient/async-http-client/commit/a5422493b638226666a1ecb5f82826c7c7845b99
    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-qhv6-3pmh-95q4
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-07T21:54:15.106Z'
---

## Overview

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. In 3.0.12, a peer offering only Digest qop=auth-int causes mutual-authentication verification to be skipped. AuthenticatorUtils.computeExpectedRspAuth returns no expected value for auth-int, and Interceptors treats that result as unverifiable but nonfatal, so a response with an invalid rspauth value is accepted. A peer that does not know the shared secret can therefore be accepted as the authenticated server. This issue is fixed in version 3.0.13.

## Remediation

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