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CVE-2026-107285— AsyncHttpClient: WebSocket proxy credentials sent to the origin server over a CONNECT tunnel

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) 库允许 Java 应用程序轻松执行 HTTP 请求并异步处理 HTTP 响应。在版本 3.0.12 和 2.16.1 之前，通过代理进行的 WebSocket 请求使用 CONNECT 方法隧道传输，但 和 仅根据 URI 是否为安全协议（如 HTTPS）来决定是否附加代理认证信息和绝对形式的目标地址。由于 WebSocket 协议未被标记为安全协议，因此隧道传输中发送给原始服务器的 WebSocket 升级请求中会包含代理的 头部值。这会导致基本认证（Basic）凭据可

CVSS 5.9 · Medium

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle
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I. Basic Information for CVE-2026-107285

Vulnerability Information
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Vulnerability Title
AsyncHttpClient: WebSocket proxy credentials sent to the origin server over a CONNECT tunnel
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 3.0.12 and 2.16.1, a proxied ws request is carried through CONNECT, but NettyRequestFactory.newNettyRequest and requestUri decide whether to attach proxy authentication and an absolute-form target only from whether the URI is secure. Because ws is not marked secure, the tunneled WebSocket upgrade sent to the origin includes the proxy's Proxy-Authorization value. Basic credentials are directly recoverable and Digest responses can be replayed or cracked offline. This issue is fixed in versions 3.0.12 and 2.16.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
敏感数据的明文传输
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
AsyncHttpClient async-http-client >= 3.0.0, <3.0.12 -

II. Public POCs for CVE-2026-107285

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III. Intelligence Information for CVE-2026-107285

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Other References for CVE-2026-107285 (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-2026-107281 7.6 HIGH AsyncHttpClient: Connection pool key omits the authenticated principal, so an NTLM or Nego
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-2026-107229 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-319

V. Comments for CVE-2026-107285

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