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CVE-2025-68458— webpack buildHttp: allowedUris allow-list bypass via URL userinfo (@) leading to build-time SSRF behavior

Quick assessment

Affected
webpack webpack
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.

Webpack是Webpack开源的一个模块打包器。它的主要目的是捆绑 JavaScript 文件以便在浏览器中使用，但它也能够转换、捆绑或打包几乎任何资源或资产。 Webpack 5.49.0至5.104.1之前版本存在代码问题漏洞，该漏洞源于当启用experiments.buildHttp时，可通过使用包含用户信息的特制URL绕过HTTP(S)解析器以从允许列表外的主机获取资源，可能导致策略或允许列表绕过，从而在构建时引发服务端请求伪造行为。

CVSS 3.7 · Low EPSS 0.21% · P10
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I. Basic Information for CVE-2025-68458

Vulnerability Information
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Vulnerability Title
webpack buildHttp: allowedUris allow-list bypass via URL userinfo (@) leading to build-time SSRF behavior
Source: CVE Program / CVE List V5
Vulnerability Description
Webpack is a module bundler. From version 5.49.0 to before 5.104.1, when experiments.buildHttp is enabled, webpack’s HTTP(S) resolver (HttpUriPlugin) can be bypassed to fetch resources from hosts outside allowedUris by using crafted URLs that include userinfo (username:password@host). If allowedUris enforcement relies on a raw string prefix check (e.g., uri.startsWith(allowed)), a URL that looks allow-listed can pass validation while the actual network request is sent to a different authority/host after URL parsing. This is a policy/allow-list bypass that enables build-time SSRF behavior (outbound requests from the build machine to internal-only endpoints, depending on network access) and untrusted content inclusion (the fetched response is treated as module source and bundled). This issue has been patched in version 5.104.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Webpack 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Webpack是Webpack开源的一个模块打包器。它的主要目的是捆绑 JavaScript 文件以便在浏览器中使用，但它也能够转换、捆绑或打包几乎任何资源或资产。 Webpack 5.49.0至5.104.1之前版本存在代码问题漏洞，该漏洞源于当启用experiments.buildHttp时，可通过使用包含用户信息的特制URL绕过HTTP(S)解析器以从允许列表外的主机获取资源，可能导致策略或允许列表绕过，从而在构建时引发服务端请求伪造行为。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
webpack webpack >= 5.49.0, < 5.104.1 -

II. Public POCs for CVE-2025-68458

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III. Intelligence Information for CVE-2025-68458

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IV. Related Vulnerabilities

Same product: webpack
Same vendor: webpack
Same weakness: CWE-918

V. Comments for CVE-2025-68458

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