CVE-2021-3807

Name: CVE-2021-3807
Creator: NVD / NIST
Published: 2021-09-17T07:15:09.273+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 3.30%

Last modified Jun 17, 2026

CVE-2021-3807 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. ansi-regex is vulnerable to Inefficient Regular Expression Complexity. EPSS estimates a 3.30% chance of exploitation in the next 30 days.

Description

ansi-regex is vulnerable to Inefficient Regular Expression Complexity

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

3.30%

87.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Ansi-Regex Project	Ansi-Regex	>= 4.0.0, < 4.1.1
Ansi-Regex Project	Ansi-Regex	3.0.0
Ansi-Regex Project	Ansi-Regex	5.0.0
Ansi-Regex Project	Ansi-Regex	6.0.0
Oracle	Communications Cloud Native Core Policy	1.15.0

References

https://github.com/chalk/ansi-regex/commit/8d1d7cdb586269882c4bdc1b7325d0c58c8f76f9Patch, Third Party Advisory
https://huntr.dev/bounties/5b3cf33b-ede0-4398-9974-800876dfd994Exploit, Issue Tracking, Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20221014-0002/Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
https://github.com/chalk/ansi-regex/commit/8d1d7cdb586269882c4bdc1b7325d0c58c8f76f9Patch, Third Party Advisory
https://huntr.dev/bounties/5b3cf33b-ede0-4398-9974-800876dfd994Exploit, Issue Tracking, Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20221014-0002/Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory

Timeline

Published: Sep 17, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3807?

ansi-regex is vulnerable to Inefficient Regular Expression Complexity

How severe is CVE-2021-3807?

CVE-2021-3807 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.30% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3807?

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-2021-3807?

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

Scan your code now

Source: NVD / NIST