VULNERABILITY INTELLIGENCE

CVE-2021-33502

CVSS score7.5 HIGH

EPSS probability1.70%

CISA KEVNot currently listed

Published2021-05-24

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

The normalize-url package before 4.5.1, 5.x before 5.3.1, and 6.x before 6.0.1 for Node.js has a ReDoS (regular expression denial of service) issue because it has exponential performance for data: URLs.

Weakness classification

nvd@nist.gov: CWE-1333

Primary references

cve@mitre.org — Release Notes, Third Party Advisory
cve@mitre.org — Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory