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CVE-2026-107281— AsyncHttpClient: Connection pool key omits the authenticated principal, so an NTLM or Negotiate connection is reused across identities

Quick assessment

Affected
AsyncHttpClient async-http-client
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

AsyncHttpClient（AHC）库使 Java 应用程序能够轻松地执行 HTTP 请求并异步处理 HTTP 响应。在版本 3.0.13 和 2.16.1 之前，HTTP/1.1 连接池的键在面向连接的 NTLM 和 Negotiate 身份验证中不包含已认证主体（authenticated principal）。这意味着，为某个请求进行 Socket 连接池化后，带有不同身份的后续请求可能复用该连接，而服务器会将该后续请求视为第一个身份的执行者。由于 Basic（基本）和 Digest（摘要）身份验证会对每

CVSS 7.6 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-107281

Vulnerability Information
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Vulnerability Title
AsyncHttpClient: Connection pool key omits the authenticated principal, so an NTLM or Negotiate connection is reused across identities
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
源验证错误
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
AsyncHttpClient async-http-client >= 3.0.0, < 3.0.13 -

II. Public POCs for CVE-2026-107281

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III. Intelligence Information for CVE-2026-107281

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Other References for CVE-2026-107281 (5)

Same Patch Batch · AsyncHttpClient · 2026-10-07 · 13 CVEs total

CVE-2026-107282 9.4 CRITICAL AsyncHttpClient: Replay to a different host sends the original host request and credential
CVE-2026-107279 8.8 HIGH AsyncHttpClient: Digest mutual authentication is switched off by a peer offering qop=auth-
CVE-2026-107231 8.7 HIGH AsyncHttpClient: Digest challenge without a usable nonce downgrades to Basic and sends the
CVE-2026-107227 7.5 HIGH AsyncHttpClient: Unbounded WebSocket permessage-deflate decompression enables a decompress
CVE-2026-107232 7.5 HIGH AsyncHttpClient: Origin credentials sent in cleartext to a proxy that rejects the CONNECT
CVE-2026-107230 7.4 HIGH AsyncHttpClient: Pooled connections can still be shared across NTLM, Negotiate and proxy l
CVE-2026-107280 6.9 MEDIUM AsyncHttpClient: Cookie Domain attribute is not checked against the public suffix list, so
CVE-2026-107228 6.8 MEDIUM AsyncHttpClient CookieStore Silently Overrides Caller's Explicit Cookie Header via setHead
CVE-2026-107285 5.9 MEDIUM AsyncHttpClient: WebSocket proxy credentials sent to the origin server over a CONNECT tunn
CVE-2026-107229 4.0 MEDIUM AsyncHttpClient: Incomplete origin checks in the default cookie store allow cookie tossing
CVE-2026-107284 3.7 LOW AsyncHttpClient: WebSocket handshake continues after a failed Sec-WebSocket-Accept check
CVE-2026-107283 3.7 LOW AsyncHttpClient: Digest authentication cnonce generated with a non-cryptographic random so

IV. Related Vulnerabilities

Same product: async-http-client
Same vendor: AsyncHttpClient
Same weakness: CWE-346

V. Comments for CVE-2026-107281

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