What is CVE-2021-22177?

CVE-2021-22177 is a medium-severity vulnerability in GitLab, classified under Uncontrolled Resource Consumption. CVSS score: 4.3/10. Published 2021-04-01.

How severe is CVE-2021-22177?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Resource exhaustion in GitLab

CVE-2021-22177

Potential DoS was identified in gitlab-shell in GitLab CE/EE version 12.6.0 or above, which allows an attacker to spike the server resource utilization via gitlab-shell command.

Vulnerability class: DoS (Denial of Service)

Published 2021-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.012 (67.1th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 67.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

GitLab — versions >=12.6, <13.6.7, >=13.7, <13.7.7, >=13.8, <13.8.4

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

gitlab.com/gitlab-org/gitlab/-/issues/238988 (Broken Link)
hackerone.com/reports/953444 (Permissions Required, Third Party Advisory)
gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-22177.json (Vendor Advisory)

Frequently asked questions

What is CVE-2021-22177?: CVE-2021-22177 is a medium-severity vulnerability in GitLab, classified under Uncontrolled Resource Consumption. CVSS score: 4.3/10. Published 2021-04-01.
How severe is CVE-2021-22177?: Medium severity. CVSS v3 base score is 4.3 out of 10.