# urllib (npm) vulnerabilities

1 known vulnerability (1 high), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 4.9.0 (Dec 13, 2025): affected by CVE-2026-55553
- Newest unaffected release: 4.9.1 (Jun 13, 2026)
- Weekly downloads: 901.4K
- Dependents: 430
- Releases: 250 since 0.0.1 (May 16, 2011)
- Registry: https://www.npmjs.com/package/urllib
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-55553: 0.0.1 to 2.44.0 (2.44.1 is outside it); 3.0.0 to 4.9.0 (4.9.1 is outside it)

## Advisories (1)

### [CVE-2026-55553](https://cve.now/CVE-2026-55553): urllib: Cross-origin redirects preserve credential-bearing request headers, leading to potential credential leakage

- Severity: High 7.5
- Published: Aug 25, 2026
- Affected: from 3.0.0, fixed in 4.9.1; fixed in 2.44.1.
- Fixed in 2.44.1 (released Jun 13, 2026, 73 days before disclosure) and 4.9.1 (released Jun 13, 2026, 73 days before disclosure).
- The latest release, 4.9.0, is still affected.
- 49% of urllib downloads last week were affected versions (470.3K).

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