# webpack-dev-middleware (npm) vulnerabilities

2 known vulnerabilities (2 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 8.6.0 (Oct 29, 2026): no advisory affects it
- Newest unaffected release: 8.6.0 (Oct 29, 2026), the latest release
- Weekly downloads: 30.5M
- Dependents: 384
- Releases: 133 since 0.5.0 (Aug 8, 2012)
- Registry: https://www.npmjs.com/package/webpack-dev-middleware
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-76844: 0.5.0 to 7.4.5 (7.4.6 is outside it); 8.0.0 to 8.2.0 (8.3.0 is outside it)
- CVE-2024-29180: 0.5.0 to 5.3.3 (5.3.4 is outside it); 6.0.0 to 6.1.1 (6.1.2 is outside it); 7.0.0 (7.1.0 is outside it)

## Advisories (2)

### [CVE-2026-76844](https://cve.now/CVE-2026-76844): zlib 1.2.11 through 1.3.2 Heap Buffer Overflow via Stale gzwrite Pointer After Failed Write

- Severity: High 8.3
- Published: Aug 24, 2026
- Affected: from 8.0.0, fixed in 8.3.0; fixed in 7.4.6.
- Fixed in 7.4.6 (released Sep 3, 2026, 10 days after disclosure) and 8.3.0 (released Sep 3, 2026, 10 days after disclosure).
- The latest release, 8.6.0, is not affected.
- 87% of webpack-dev-middleware downloads last week were affected versions (31.1M).

### [CVE-2024-29180](https://cve.now/CVE-2024-29180): webpack-dev-middleware Path Traversal vulnerability

- Severity: High 7.4
- Published: Mar 21, 2024
- Affected: from 7.0.0, fixed in 7.1.0; from 6.0.0, fixed in 6.1.2; fixed in 5.3.4.
- Fixed in 5.3.4 (released Mar 20, 2024, 1 day before disclosure), 6.1.2 (released Mar 20, 2024, 1 day before disclosure) and 7.1.0 (released Mar 19, 2024, 2 days before disclosure).
- The latest release, 8.6.0, is not affected.
- 21% of webpack-dev-middleware downloads last week were affected versions (7.4M).

---

Source: cve.now
Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards.
Page: https://cve.now/packages/npm/webpack-dev-middleware
Site guide for agents: https://cve.now/llms.txt
Uses NVD data; not endorsed by NVD.