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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-107230
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-07 22:17:03 UTC
Updated2026-10-07 22:17:03 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v3.1 7.4 HIGH from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Problem Types: CWE-346 | CWE-863 | CWE-346 CWE-346: Origin Validation Error | CWE-863 CWE-863: Incorrect Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
3.1CNADECLARED7.4HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA AsyncHttpClient Async-http-client affected >= 3.0.0, < 3.0.14 Not specified
CNA AsyncHttpClient Async-http-client affected >= 2.0.0, <= 2.16.1 Not specified

References

ReferenceSourceLinkTags
github.com/AsyncHttpClient/async-http-client/commit/d3bb4d68b41acf5d3ab7... [email protected] github.com
github.com/AsyncHttpClient/async-http-client/security/advisories/GHSA-v2... [email protected] github.com
github.com/AsyncHttpClient/async-http-client/releases/tag/async-http-cli... [email protected] github.com
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