GitLab prior 16.4.3/16.5.3/16.6.1 Branch Check code injection

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.2$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in GitLab. This issue affects some unknown processing of the component Branch Check Handler. Performing a manipulation results in code injection. This vulnerability is identified as CVE-2023-5226. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in GitLab (Bug Tracking Software). This affects some unknown functionality of the component Branch Check Handler. The manipulation with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on integrity. The summary by CVE is:

An issue has been discovered in GitLab affecting all versions before 16.4.3, all versions starting from 16.5 before 16.5.3, all versions starting from 16.6 before 16.6.1. Under certain circumstances, a malicious actor bypass prohibited branch checks using a specially crafted branch name to manipulate repository content in the UI.

The weakness was released 12/01/2023. It is possible to read the advisory at gitlab.com. This vulnerability is uniquely identified as CVE-2023-5226 since 09/27/2023. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1059 according to MITRE ATT&CK.

Upgrading to version 16.4.3, 16.5.3 or 16.6.1 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-57555). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 4.8
CNA Vector (GitLab Inc.): 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Code injection
CWE: CWE-94 / CWE-74 / CWE-707
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: GitLab 16.4.3/16.5.3/16.6.1

Timelineinfo

09/27/2023 🔍
12/01/2023 +65 days 🔍
12/01/2023 +0 days 🔍
11/20/2025 +720 days 🔍

Sourcesinfo

Advisory: 42640
Status: Confirmed

CVE: CVE-2023-5226 (🔍)
GCVE (CVE): GCVE-0-2023-5226
GCVE (VulDB): GCVE-100-246591
EUVD: 🔍

Entryinfo

Created: 12/01/2023 08:20
Updated: 11/20/2025 14:09
Changes: 12/01/2023 08:20 (48), 12/21/2023 17:53 (1), 12/21/2023 18:00 (12), 11/20/2025 14:09 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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