Webpack up to 5.103.x server-side request forgery

Summaryinfo

A vulnerability identified as critical has been detected in Webpack up to 5.103.x. This affects an unknown function. This manipulation causes server-side request forgery. This vulnerability is registered as CVE-2025-68157. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Webpack up to 5.103.x and classified as critical. Affected by this vulnerability is some unknown functionality. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Webpack is a module bundler. From version 5.49.0 to before 5.104.0, when experiments.buildHttp is enabled, webpack’s HTTP(S) resolver (HttpUriPlugin) enforces allowedUris only for the initial URL, but does not re-validate allowedUris after following HTTP 30x redirects. As a result, an import that appears restricted to a trusted allow-list can be redirected to HTTP(S) URLs outside the allow-list. This is a policy/allow-list bypass that enables build-time SSRF behavior (requests from the build machine to internal-only endpoints, depending on network access) and untrusted content inclusion in build outputs (redirected content is treated as module source and bundled). This issue has been patched in version 5.104.0.

The advisory is shared at github.com. This vulnerability is known as CVE-2025-68157 since 12/16/2025. The exploitation appears to be difficult. The attack can be launched remotely. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 298272 (Linux Distros Unpatched Vulnerability : CVE-2025-68157), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.104.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (298272). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Name

• Webpack

Version

• 5.103

Website

• Product: https://github.com/webpack/webpack/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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