SSRF in Webpack
CVE-2025-68458
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.
Vulnerability class: SSRF (Server-Side Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.002 (10.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 10.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Webpack — versions >= 5.49.0, < 5.104.1
- Webpack.js Webpack
Weakness classification (CWE)
References
- github.com/webpack/webpack/security/advisories/GHSA-8fgc-7cc6-rx7x (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-68458?
- CVE-2025-68458 is a low-severity vulnerability in Webpack, classified under Server-Side Request Forgery (SSRF). CVSS score: 3.7/10. Published 2026-02-05.
- How severe is CVE-2025-68458?
- Low severity. CVSS v3 base score is 3.7 out of 10.