CVE-2026-107230

AsyncHttpClient: Pooled connections can still be shared across NTLM, Negotiate and proxy logins

Published Oct 7, 2026 CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
Description
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.0.0 until 3.0.14, connection-pool partitioning still omits identity-defining fields for Kerberos, SPNEGO, NTLM, and authenticated proxy connections. Logins without a configured principal, proxy realms, identities sharing a user name, and SOCKS or CONNECT proxy logins can reuse a socket authenticated as a different identity. A later request is then executed under the first identity and can expose that identity's data or authority to another caller. In the affected execution path, SpnegoEngine, NTLM, Kerberos, SPNEGO, SOCKS, and CONNECT control or expose the vulnerable behavior. This issue is fixed in version 3.0.14.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-v2j5-22fr-j62r AsyncHttpClient: Pooled connections can still be shared across NTLM, Negotiate and proxy logins
History
Type Values Removed Values Added
First Time appeared Asynchttpclient Project
Asynchttpclient Project async-http-client
Vendors & Products Asynchttpclient Project
Asynchttpclient Project async-http-client
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. From 2.0.0 until 3.0.14, connection-pool partitioning still omits identity-defining fields for Kerberos, SPNEGO, NTLM, and authenticated proxy connections. Logins without a configured principal, proxy realms, identities sharing a user name, and SOCKS or CONNECT proxy logins can reuse a socket authenticated as a different identity. A later request is then executed under the first identity and can expose that identity's data or authority to another caller. In the affected execution path, SpnegoEngine, NTLM, Kerberos, SPNEGO, SOCKS, and CONNECT control or expose the vulnerable behavior. This issue is fixed in version 3.0.14.
Title AsyncHttpClient: Pooled connections can still be shared across NTLM, Negotiate and proxy logins
Weaknesses CWE-346
CWE-863
References
Metrics cvssV3_1

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Oct 8, 2026, 5:59 PM
Reserved
Oct 7, 2026, 2:34 PM
Status
Awaiting Analysis
Published
Oct 7, 2026, 10:17 PM
Modified
Oct 8, 2026, 8:35 PM
Severity
Important
Public date
Oct 7, 2026, 9:00 PM