CVE-2021-3810

Name: CVE-2021-3810
Creator: NVD / NIST
Published: 2021-09-17T07:15:09.333+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.22%

Last modified Jun 17, 2026

CVE-2021-3810 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. code-server is vulnerable to Inefficient Regular Expression Complexity. EPSS estimates a 1.22% chance of exploitation in the next 30 days.

Description

code-server 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

1.22%

64.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Coder	Code-Server	< 3.12.0

References

https://github.com/cdr/code-server/commit/ca617df135e78833f93c8320cb2d2cf8bba809f5Patch, Third Party Advisory
https://huntr.dev/bounties/38888513-30fc-4d8f-805d-34070d60e223Exploit, Issue Tracking, Patch, Third Party Advisory
https://github.com/cdr/code-server/commit/ca617df135e78833f93c8320cb2d2cf8bba809f5Patch, Third Party Advisory
https://huntr.dev/bounties/38888513-30fc-4d8f-805d-34070d60e223Exploit, Issue Tracking, Patch, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2021-3810?

code-server is vulnerable to Inefficient Regular Expression Complexity

How severe is CVE-2021-3810?

CVE-2021-3810 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.22% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3810?

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-2021-3810?

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

Scan your code now

Source: NVD / NIST