CVE-2021-39877

5.5 mediumEPSS 1.0%

Medium (5.5) in gitlab gitlab. EPSS 1.0% chance of exploitation in the next 30 days.

A vulnerability was discovered in GitLab starting with version 12.2 that allows an attacker to cause uncontrolled resource consumption with a specially crafted file.

Severity

CVSS 3.1

5.5 medium

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

EPSS: 1.0% chance of exploitation in the next 30 days; higher than 64% of CVEs (scores of 2026-10-31)
CWE: CWE-400
Published: 2021-10-04
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

gitlab:gitlab

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39877.json
https://gitlab.com/gitlab-org/gitlab/-/issues/300095
https://hackerone.com/reports/1077021
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39877.json
https://gitlab.com/gitlab-org/gitlab/-/issues/300095

Check your stack JSON