CVE-2021-39942

Name: CVE-2021-39942
Creator: NVD / NIST
Published: 2022-01-18T17:15:08.723+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.45%

Last modified Jun 17, 2026

CVE-2021-39942 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A denial of service vulnerability in GitLab CE/EE affecting all versions starting from 12.0 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, allows low-privileged users to bypass file size limits in the NPM package repository to potentially cause denial of service.. EPSS estimates a 1.45% chance of exploitation in the next 30 days.

Description

A denial of service vulnerability in GitLab CE/EE affecting all versions starting from 12.0 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2, allows low-privileged users to bypass file size limits in the NPM package repository to potentially cause denial of service.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.45%

70.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Gitlab	Gitlab	>= 12.0, < 14.3.6
Gitlab	Gitlab	>= 14.4, < 14.4.4
Gitlab	Gitlab	>= 14.5, < 14.5.2

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39942.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/297492Broken Link, Vendor Advisory
https://hackerone.com/reports/1071861Permissions Required, Third Party Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39942.jsonVendor Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/297492Broken Link, Vendor Advisory
https://hackerone.com/reports/1071861Permissions Required, Third Party Advisory

Timeline

Published: Jan 18, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-39942?

How severe is CVE-2021-39942?

CVE-2021-39942 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.45% probability of exploitation in the next 30 days.

How do I fix CVE-2021-39942?

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-2021-39942?

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

Scan your code now

Source: NVD / NIST