What’s Vulnerable › Vulnerabilities
CVE-2025-68157: webpack buildHttp HttpUriPlugin allowedUris bypass via HTTP redirects
- Severity: low (CVSS 3.7 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2026-02-05 · updated 2026-06-17
- Weakness: CWE-918
Description
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.
Affected products
- webpack: from 5.49.0 before 5.104.0 — fixed in 5.104.0
How to fix
Upgrade to a fixed version: webpack 5.104.0. Check the vendor advisory for mitigations.
References
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