A potential DOS vulnerability was discovered in GitLab starting with version 9.1 that allowed parsing files without authorisation.

published 2021-10-05 5 y ago modified 2026-09-08 2 mo ago also BIT-gitlab-2021-39893 , EUVD-2021-26249

cvss: 5.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.3%; EPSS 1.3% chance of exploitation in 30 days, percentile 69%
public exploits: 0; none known

Patch / fix

fixed in 3 distros 1

bitnami gitlab 14.1.7, 14.2.5, 14.3.1
gitlab gitlab 14.1.7, 14.2.5, 14.3.1
gitlab gitlab_enterprise 14.1.7, 14.2.5, 14.3.1

gitlab Arch Linux 14.3.1-1

arch linux advisories AVG-2431

Exploit prediction

1.26% chance of exploitation in the next 30 days, higher than 69% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.3	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P
OSV	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
bitnami	gitlab	>=9.1.0, <14.1.7 >=14.2.0, <14.2.5 >=14.3.0, <14.3.1	14.1.7 14.2.5 14.3.1

Affected products

GitLab GitLab

Classification

Weakness

CWE-862 Missing Authorization

Technology feeds

GitLab rss critical rss

References

gitlab.com /gitlab-org/cves/-/blob/master/2021/CVE-2021-39893.json
vendor-advisory, advisory
gitlab.com /gitlab-org/gitlab/-/issues/340076
broken-link, web
nvd.nist.gov /vuln/detail/CVE-2021-39893
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Enhance with deb and rpm package type records.

Summary