CVE-2021-39940

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

An issue has been discovered in GitLab CE/EE affecting all versions starting from 13.2 before 14.3.6, all versions starting from 14.4 before 14.4.4, all versions starting from 14.5 before 14.5.2. GitLab Maven Package registry is vulnerable to a regular expression denial of service when a specifically crafted string is sent.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-1333

Affected software

Vendor	Product	Versions
GitLab	GitLab	>=14.5, <14.5.2; >=14.4, <14.4.4; >=13.2, <14.3.6

References

https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39940.jsonThird Party Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/263116Broken Link
https://hackerone.com/reports/997961Permissions Required, Third Party Advisory
https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39940.jsonThird Party Advisory
https://gitlab.com/gitlab-org/gitlab/-/issues/263116Broken Link
https://hackerone.com/reports/997961Permissions Required, Third Party Advisory

Timeline

Published: Dec 13, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-399415.3An information disclosure vulnerability in GitLab CE/EE versions 12.0 to 14.3.6, 14.4 to 14.4.4, and 14.5 to 14.5.2 allowed non-project memb CVE-2021-399426.5A 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 b CVE-2021-399434.3An authorization logic error in the External Status Check API in GitLab EE affecting all versions starting from 14.1 before 14.3.6, all vers CVE-2021-399447.1An issue has been discovered in GitLab CE/EE affecting all versions starting from 11.0 before 14.3.6, all versions starting from 14.4 before CVE-2021-399452.7Improper access control in the GitLab CE/EE API affecting all versions starting from 9.4 before 14.3.6, all versions starting from 14.4 befo CVE-2021-399465.4Improper neutralization of user input in GitLab CE/EE versions 14.3 to 14.3.6, 14.4 to 14.4.4, and 14.5 to 14.5.2 allowed an attacker to exp CVE-2021-399477.5In specific circumstances, trace file buffers in GitLab Runner versions up to 14.3.4, 14.4 to 14.4.2, and 14.5 to 14.5.2 would re-use the fi CVE-2021-39955.5A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem.CVE-2021-39965.5A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem.CVE-2021-399667.5There is an Uninitialized AOD driver structure in Smartphones.Successful exploitation of this vulnerability may affect service confidentiali CVE-2021-399677.5There is a Vulnerability of obtaining broadcast information improperly due to improper broadcast permission settings in Smartphones.Successf CVE-2021-399687.5Changlian Blocklist has a Business Logic Errors vulnerability .Successful exploitation of this vulnerability may expand the attack surface o