CVE-2026-107281High· 7.6▾ Twilight

The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses

▾ Twilight zone — High severity, or a signal on a lesser flaw

Depth score42/ 100 · Moderate

impact 41.8 · likelihood 0 · exploitation 0

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Proof of concept

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Published

Oct 7, 2026

Updated

Oct 7, 2026

CVSS

7.6

Vendor

AsyncHttpClient

Product

async-http-client

CWE

CWE-346, CWE-863

Depth score

42 · Moderate

EPSS

—

Platforms

—

Source

NVD

Vector

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

AsyncHttpClient CWE-346 CWE-863 #nvd #cve.org

Affected

async-http-client >= 3.0.0, < 3.0.13
async-http-client >= 2.0.0, < 2.16.1

Full technical detail▾

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.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd#cve.org