CVE-2026-6402
medium
CVSS v3
6.5
CVSS v4 NEW
—
VIR risk
6.5
Description
webpack-dev-server vulnerable to cross-origin source code exposure on non-HTTPS origins
Predictions
Exploit likelihood
75%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Windows Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| npm | webpack-dev-server | <5.2.4 | 5.2.4 |
| NPM | webpack-dev-server | <= 5.2.3 | 5.2.4 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| webpack.js | webpack-dev-server | {"endExcluding":"5.2.4"} | 5.2.4 |
References
- https://cna.openjsf.org/security-advisories.html
- https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-79cf-xcqc-c78w
- https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-4v9v-hfq4-rm2v
- https://github.com/webpack/webpack-dev-server/security/advisories/GHSA-9jgg-88mc-972h
- https://nvd.nist.gov/vuln/detail/CVE-2026-6402
- https://github.com/webpack/webpack-dev-server
- https://www.suse.com/security/cve/CVE-2026-6402.html
- https://github.com/advisories/GHSA-79cf-xcqc-c78w
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-6402
CWEs
CWE-749
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.