CVE-2026-107231— AsyncHttpClient: Digest challenge without a usable nonce downgrades to Basic and sends the password in cleartext
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 3.0.13 和 2.16.1 版本之前，Realm.Builder 会将不产生有效 nonce 的 Digest 挑战误认为 Basic 挑战。恶意源站或代理服务器可以在将挑战标记为 Digest 类型时省略 nonce 字段或将其置为空，从而导致客户端以可逆的 Basic 认证方式重新发送用户名和密码。源站和代理服务器端的挑战解析器均受此问题影响。该问题已在版本 3.0.13 和 2.
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I. Basic Information for CVE-2026-107231
Vulnerability Information
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Vulnerability Title
AsyncHttpClient: Digest challenge without a usable nonce downgrades to Basic and sends the password in cleartext
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, Realm.Builder treats a Digest challenge that yields no usable nonce as a Basic challenge. A malicious origin or proxy can label a challenge Digest while omitting or emptying the nonce, causing the client to resend the username and password using reversible Basic authentication. Both origin and proxy challenge parsers are affected. 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:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA: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.Beta1, < 3.0.13 | - |
|
II. Public POCs for CVE-2026-107231
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2026-107231 (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-2026-107281 | 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-2026-107285 | 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
-
CVE-2026-107285
AsyncHttpClient: WebSocket proxy credentials sent to the ori -
CVE-2026-107284
AsyncHttpClient: WebSocket handshake continues after a faile -
CVE-2026-107283
AsyncHttpClient: Digest authentication cnonce generated with -
CVE-2026-107282
AsyncHttpClient: Replay to a different host sends the origin -
CVE-2026-107281
AsyncHttpClient: Connection pool key omits the authenticated
Same vendor: AsyncHttpClient
-
CVE-2026-107285
AsyncHttpClient: WebSocket proxy credentials sent to the ori -
CVE-2026-107284
AsyncHttpClient: WebSocket handshake continues after a faile -
CVE-2026-107283
AsyncHttpClient: Digest authentication cnonce generated with -
CVE-2026-107282
AsyncHttpClient: Replay to a different host sends the origin -
CVE-2026-107281
AsyncHttpClient: Connection pool key omits the authenticated
Same weakness: CWE-319
-
CVE-2026-107285
AsyncHttpClient: WebSocket proxy credentials sent to the ori -
CVE-2026-107282
AsyncHttpClient: Replay to a different host sends the origin -
CVE-2026-107232
AsyncHttpClient: Origin credentials sent in cleartext to a p -
CVE-2026-107121
Keycloak-services: keycloak-services: smtp starttls plaintex -
CVE-2026-105766
Chainguard Academy (edu) Nginx directory redirect downgrades
V. Comments for CVE-2026-107231
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