CVE-2026-40490— Async Http Client 安全漏洞
一分钟漏洞结论
影响对象
AsyncHttpClient async-http-client
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Async Http Client是AsyncHttpClient开源的适用于Java的异步Http和WebSocket客户端库。 Async Http Client 3.0.9之前版本和2.14.5之前版本存在安全漏洞，该漏洞源于重定向时转发授权标头和凭据，可能导致凭据泄露。
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一、 漏洞 CVE-2026-40490 基础信息
漏洞信息
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Vulnerability Title
AsyncHttpClient leaks authorization credentials to untrusted domains on cross-origin redirects
来源: CVE Program / CVE List V5
Vulnerability Description
The AsyncHttpClient (AHC) library allows Java applications to easily execute HTTP requests and asynchronously process HTTP responses. When redirect following is enabled (followRedirect(true)), versions of AsyncHttpClient prior to 3.0.9 and 2.14.5 forward Authorization and Proxy-Authorization headers along with Realm credentials to arbitrary redirect targets regardless of domain, scheme, or port changes. This leaks credentials on cross-domain redirects and HTTPS-to-HTTP downgrades. Additionally, even when stripAuthorizationOnRedirect is set to true, the Realm object containing plaintext credentials is still propagated to the redirect request, causing credential re-generation for Basic and Digest authentication schemes via NettyRequestFactory. An attacker who controls a redirect target (via open redirect, DNS rebinding, or MITM on HTTP) can capture Bearer tokens, Basic auth credentials, or any other Authorization header value. The fix in versions 3.0.9 and 2.14.5 automatically strips Authorization and Proxy-Authorization headers and clears Realm credentials whenever a redirect crosses origin boundaries (different scheme, host, or port) or downgrades from HTTPS to HTTP. For users unable to upgrade, set `(stripAuthorizationOnRedirect(true))` in the client config and avoid using Realm-based authentication with redirect following enabled. Note that `(stripAuthorizationOnRedirect(true))` alone is insufficient on versions prior to 3.0.9 and 2.14.5 because the Realm bypass still re-generates credentials. Alternatively, disable redirect following (`followRedirect(false)`) and handle redirects manually with origin validation.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
信息暴露
来源: CVE Program / CVE List V5
Vulnerability Title
Async Http Client 安全漏洞
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Description
Async Http Client是AsyncHttpClient开源的适用于Java的异步Http和WebSocket客户端库。 Async Http Client 3.0.9之前版本和2.14.5之前版本存在安全漏洞，该漏洞源于重定向时转发授权标头和凭据，可能导致凭据泄露。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| AsyncHttpClient | async-http-client | >= 3.0.0.Beta1, < 3.0.9 | - |
|
二、漏洞 CVE-2026-40490 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-40490 补丁与修复 (1)
CVE-2026-40490 厂商安全公告 (1)
IV. Related Vulnerabilities
V. Comments for CVE-2026-40490
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