SSRF in Webpack
CVE-2025-68157
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.
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, < 5.104.0
- Webpack.js Webpack
Weakness classification (CWE)
References
- github.com/webpack/webpack/security/advisories/GHSA-38r7-794h-5758 (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2025-68157?
- CVE-2025-68157 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-2025-68157?
- Low severity. CVSS v3 base score is 3.7 out of 10.