GitLab Enterprise Edition up to 18.11.5/19.0.2/19.1.0 cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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6.0$0-$5k1.81

Summaryinfo

A vulnerability categorized as problematic has been discovered in GitLab Enterprise Edition up to 18.11.5/19.0.2/19.1.0. This impacts an unknown function. The manipulation results in cross site scripting. This vulnerability was named CVE-2026-10086. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in GitLab Enterprise Edition up to 18.11.5/19.0.2/19.1.0. It has been classified as problematic. Affected is an unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

GitLab has remediated an issue in GitLab EE affecting all versions from 16.4 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary client-side code in the context of another user's session, due to improper sanitization of user-supplied input.

The weakness was presented by yvvdwf. The advisory is shared for download at gitlab.com. This vulnerability is traded as CVE-2026-10086 since 05/29/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1059.007.

The vulnerability scanner Nessus provides a plugin with the ID 322749 (GitLab 16.4 < 18.11.6 / 19.0 < 19.0.3 / 19.1 < 19.1.1 (CVE-2026-10086)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 18.11.6, 19.0.3 or 19.1.1 eliminates this vulnerability. The upgrade is hosted for download at docs.gitlab.com.

The vulnerability is also documented in the databases at Tenable (322749) and EUVD (EUVD-2026-39181). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

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

CNA Base Score: 8.7
CNA Vector (GitLab): 🔒

CVSSv2info

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

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
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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Nessus ID: 322749
Nessus Name: GitLab 16.4 < 18.11.6 / 19.0 < 19.0.3 / 19.1 < 19.1.1 (CVE-2026-10086)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Enterprise Edition 18.11.6/19.0.3/19.1.1

Timelineinfo

05/29/2026 CVE reserved
06/25/2026 +27 days Advisory disclosed
06/25/2026 +0 days VulDB entry created
06/25/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: gitlab.com

Advisory: gitlab.com
Researcher: yvvdwf
Status: Confirmed

CVE: CVE-2026-10086 (🔒)
GCVE (CVE): GCVE-0-2026-10086
GCVE (VulDB): GCVE-100-373668
EUVD: 🔒

Entryinfo

Created: 06/25/2026 08:12
Updated: 06/25/2026 12:51
Changes: 06/25/2026 08:12 (66), 06/25/2026 10:58 (1), 06/25/2026 12:51 (2)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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