CVE-2023-3979

Name: CVE-2023-3979
Creator: NVD / NIST
Published: 2023-09-29T07:15:13.91+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.40%

Last modified Jun 17, 2026

CVE-2023-3979 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. An issue has been discovered in GitLab affecting all versions starting from 10.6 before 16.2.8, all versions starting from 16.3 before 16.3.5, all versions starting from 16.4 before 16.4.1. It was possible that upstream members to collaborate with you on your branch get permission to write to the merge request’s source branch.. EPSS estimates a 0.40% chance of exploitation in the next 30 days.

Description

An issue has been discovered in GitLab affecting all versions starting from 10.6 before 16.2.8, all versions starting from 16.3 before 16.3.5, all versions starting from 16.4 before 16.4.1. It was possible that upstream members to collaborate with you on your branch get permission to write to the merge request’s source branch.

Metrics

CVSS 3.1

4.3/10

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

EPSS Probability

0.40%

31.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-863

Affected Software

Vendor	Product	Versions
Gitlab	Gitlab	>= 10.6, < 16.2.8
Gitlab	Gitlab	>= 16.3.0, < 16.3.5
Gitlab	Gitlab	16.4.0

References

https://gitlab.com/gitlab-org/gitlab/-/issues/419972Broken Link
https://hackerone.com/reports/2082560Permissions Required
https://gitlab.com/gitlab-org/gitlab/-/issues/419972Broken Link
https://hackerone.com/reports/2082560Permissions Required

Timeline

Published: Sep 29, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-3979?

How severe is CVE-2023-3979?

CVE-2023-3979 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.40% probability of exploitation in the next 30 days.

How do I fix CVE-2023-3979?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-3979?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST