GitLab Enterprise Edition up to 18.10.7/18.11.4/19.0.1 Setting cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.89

Summaryinfo

A vulnerability was found in GitLab Enterprise Edition up to 18.10.7/18.11.4/19.0.1. It has been rated as problematic. The impacted element is an unknown function of the component Setting Handler. Performing a manipulation results in cross site scripting. This vulnerability is reported as CVE-2026-8589. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in GitLab Enterprise Edition up to 18.10.7/18.11.4/19.0.1. This affects an unknown function of the component Setting Handler. 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. The summary by CVE is:

GitLab has remediated an issue in GitLab EE affecting all versions from 13.1.4 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user to add unauthorized email addresses to a targeted user's account due to improper sanitization of user-supplied input in certain group setting fields.

The weakness was disclosed by go7f0. The advisory is shared at gitlab.com. This vulnerability is uniquely identified as CVE-2026-8589 since 05/14/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. Additional levels of successful authentication are required for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 18.10.8, 18.11.5 or 19.0.2 eliminates this vulnerability. The upgrade is hosted for download at about.gitlab.com.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.6
VulDB Meta Temp Score: 4.6

VulDB Base Score: 2.0
VulDB Temp Score: 1.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.3
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Enterprise Edition 18.10.8/18.11.5/19.0.2

Timelineinfo

05/14/2026 CVE reserved
06/11/2026 +28 days Advisory disclosed
06/11/2026 +0 days VulDB entry created
06/11/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: gitlab.com

Advisory: gitlab.com
Researcher: go7f0
Status: Confirmed

CVE: CVE-2026-8589 (🔒)
GCVE (CVE): GCVE-0-2026-8589
GCVE (VulDB): GCVE-100-370377

Entryinfo

Created: 06/11/2026 16:22
Changes: 06/11/2026 16:22 (67)
Complete: 🔍
Cache ID: 216::103

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