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CVE-2023-6840

Missing Authorization in GitLab

6.7 MediumFix available

An issue has been discovered in GitLab EE affecting all versions from 16.4 prior to 16.6.7, 16.7 prior to 16.7.5, and 16.8 prior to 16.8.2 which allows a maintainer to change the name of a protected branch that bypasses the security policy added to block MR.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
High
User interaction
None

What an attacker can affect

Confidentiality
Low
Integrity
High
Availability
High

Exploit likelihood

0.56%Up 0.5 points since Feb 8, 2024
90%50%10%1%

What each source reports

CVE List Score used6.7

Missing Authorization in GitLab

An issue has been discovered in GitLab EE affecting all versions from 16.4 prior to 16.6.7, 16.7 prior to 16.7.5, and 16.8 prior to 16.8.2 which allows a maintainer to change the name of a protected branch that bypasses the security policy added to block MR.

Record
CVE-2023-6840
CVSS 3.1
6.7 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H
Weakness
CWE-862
Updated
2026-11-02
EUVDEUVD-2023-590456.7

An issue has been discovered in GitLab EE affecting all versions from 16.4 prior to 16.6.7, 16.7 prior to 16.7.5, and 16.8 prior to 16.8.2 which allows a maintainer to change the name of a protected branch that bypasses the security policy added to block MR.

Record
EUVD-2023-59045
CVSS 3.1
6.7 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-8jj6-7vgp-rg476.7

An issue has been discovered in GitLab EE affecting all versions from 16.4 prior to 16.6.7, 16.7...

An issue has been discovered in GitLab EE affecting all versions from 16.4 prior to 16.6.7, 16.7 prior to 16.7.5, and 16.8 prior to 16.8.2 which allows a maintainer to change the name of a protected branch that bypasses the security policy added to block MR.

Record
GHSA-8jj6-7vgp-rg47
CVSS 3.1
6.7 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H
Weakness
CWE-284, CWE-862
Updated
2026-11-02
NVD6.7

An issue has been discovered in GitLab EE affecting all versions from 16.4 prior to 16.6.7, 16.7 prior to 16.7.5, and 16.8 prior to 16.8.2 which allows a maintainer to change the name of a protected branch that bypasses the security policy added to block MR.

Record
CVE-2023-6840
CVSS 3.1
6.7 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H
Weakness
CWE-862
Updated
2026-11-02
OSV6.7

Missing Authorization in GitLab

An issue has been discovered in GitLab EE affecting all versions from 16.4 prior to 16.6.7, 16.7 prior to 16.7.5, and 16.8 prior to 16.8.2 which allows a maintainer to change the name of a protected branch that bypasses the security policy added to block MR.

Record
CVE-2023-6840
CVSS 3.1
6.7 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H
Weakness
CWE-862
Updated
2026-11-02
OSVUBUNTU-CVE-2023-68406.7

An issue has been discovered in GitLab EE affecting all versions from 16.4 prior to 16.6.7, 16.7 prior to 16.7.5, and 16.8 prior to 16.8.2 which allows a maintainer to change the name of a protected branch that bypasses the security policy added to block MR.

Record
UBUNTU-CVE-2023-6840
CVSS 3.1
6.7 MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H
Updated
2026-11-02
OSVBIT-gitlab-2023-6840No score

Missing Authorization in GitLab

An issue has been discovered in GitLab EE affecting all versions from 16.4 prior to 16.6.7, 16.7 prior to 16.7.5, and 16.8 prior to 16.8.2 which allows a maintainer to change the name of a protected branch that bypasses the security policy added to block MR.

Record
BIT-gitlab-2023-6840
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
gitlab
Bitnami
16.4.0 up to 16.6.7, 16.7.0 up to 16.7.5, 16.8.0 up to 16.8.2
16.6.716.7.516.8.2
gitlab
Ubuntu:16.04:LTS
All versions, plus listed versions
8.4.3+dfsg-98.4.3+dfsg-128.5.8+dfsg-5
None known

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-6840 is a medium vulnerability (CVSS 6.7) in Gitlab, published February 7, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.56%, the 47th percentile. Fixed in gitlab 16.6.7.

References

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