GitLab up to 19.2.7/19.3.4/19.4.1 Package Registry privileges management

CVSS Meta Temp Score
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CTI Interest Score
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4.9$0-$5k2.69-

Summaryinfo

A vulnerability, which was classified as problematic, was found in GitLab up to 19.2.7/19.3.4/19.4.1. Affected by this issue is some unknown functionality of the component Package Registry. Such manipulation leads to privileges management. This vulnerability is referenced as CVE-2026-100755. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in GitLab up to 19.2.7/19.3.4/19.4.1. Affected by this issue is some unknown functionality of the component Package Registry. The manipulation with an unknown input leads to a privileges management vulnerability. Using CWE to declare the problem leads to CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. Impacted is integrity, and availability. CVE summarizes:

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 16.2 before 19.2.8, 19.3 before 19.3.5, and 19.4 before 19.4.2 that, under certain deployment configurations, could have allowed an authenticated user to poison cached page content served to other users due to improper cache key construction.

The advisory is shared for download at gitlab.com. This vulnerability is handled as CVE-2026-100755 since 09/26/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 19.2.8, 19.3.5 or 19.4.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-3858). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • Open Source GitLab

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.9

VulDB Base Score: 5.4
VulDB Temp Score: 5.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 4.6
CNA Vector (GitLab): 🔒

CVSSv2info

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

Exploitinginfo

Class: Privileges management
CWE: CWE-269 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
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 19.2.8/19.3.5/19.4.2

Timelineinfo

09/26/2026 CVE reserved
10/13/2026 +17 days Advisory disclosed
10/13/2026 +0 days VulDB entry created
10/13/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: gitlab.com
Status: Confirmed

CVE: CVE-2026-100755 (🔒)
GCVE (CVE): GCVE-0-2026-100755
GCVE (VulDB): GCVE-100-417440
CERT Bund: WID-SEC-2026-3858 - GitLab: Mehrere Schwachstellen

Entryinfo

Created: 10/13/2026 03:47
Updated: 10/13/2026 06:39
Changes: 10/13/2026 03:47 (86), 10/13/2026 06:39 (7)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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