What is CVE-2021-39914?

CVE-2021-39914 is a low-severity vulnerability in GitLab, classified under Uncontrolled Resource Consumption. CVSS score: 3.1/10. Published 2021-11-04.

How severe is CVE-2021-39914?

Low severity. CVSS v3 base score is 3.1 out of 10.

Resource exhaustion in GitLab

CVE-2021-39914

A regular expression denial of service issue in GitLab versions 8.13 to 14.2.5, 14.3.0 to 14.3.3 and 14.4.0 could cause excessive usage of resources when a specially crafted username was used when provisioning a new user

Vulnerability class: DoS (Denial of Service)

Published 2021-11-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.011 (63.5th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

GitLab — versions >=14.3.0, <14.3.4, >=8.13, <14.2.6, >=14.4.0, <14.4.1

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

gitlab.com/gitlab-org/gitlab/-/issues/289948 (Broken Link)
gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39914.json (Vendor Advisory)

Frequently asked questions

What is CVE-2021-39914?: CVE-2021-39914 is a low-severity vulnerability in GitLab, classified under Uncontrolled Resource Consumption. CVSS score: 3.1/10. Published 2021-11-04.
How severe is CVE-2021-39914?: Low severity. CVSS v3 base score is 3.1 out of 10.