CVE-2021-23490

Name: CVE-2021-23490
Creator: NVD / NIST
Published: 2021-12-24T20:15:08.013+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.83%

Last modified Jun 17, 2026

CVE-2021-23490 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. The package parse-link-header before 2.0.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the checkHeader function.. EPSS estimates a 1.83% chance of exploitation in the next 30 days.

Description

The package parse-link-header before 2.0.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the checkHeader function.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.83%

76.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1333

Affected Software

Vendor	Product	Versions
Parse-Link-Header Project	Parse-Link-Header	< 2.0.0

References

https://github.com/thlorenz/parse-link-header/commit/72f05c717b3f129c5331a07bf300ed8886eb8ae1Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2321973Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-PARSELINKHEADER-1582783Exploit, Patch, Third Party Advisory
https://github.com/thlorenz/parse-link-header/commit/72f05c717b3f129c5331a07bf300ed8886eb8ae1Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-2321973Exploit, Patch, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-PARSELINKHEADER-1582783Exploit, Patch, Third Party Advisory

Timeline

Published: Dec 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-23490?

The package parse-link-header before 2.0.0 are vulnerable to Regular Expression Denial of Service (ReDoS) via the checkHeader function.

How severe is CVE-2021-23490?

CVE-2021-23490 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.83% probability of exploitation in the next 30 days.

How do I fix CVE-2021-23490?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-23490?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST