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CVE-2026-4332— Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

Quick assessment

Affected
GitLab GitLab
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

GitLab是美国GitLab公司的一个端到端软件开发平台，具有内置的版本控制、问题跟踪、代码审查、CI/CD（持续集成和持续交付）等功能。 GitLab EE 18.8.9之前版本、18.9.5之前版本和18.10.3之前版本存在跨站脚本漏洞，该漏洞源于输入清理不当，可能导致经过身份验证的用户在其他用户的浏览器环境中执行任意JavaScript。

CVSS 5.4 · Medium EPSS 0.35% · P27

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter
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I. Basic Information for CVE-2026-4332

Vulnerability Information
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Vulnerability Title
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
Source: CVE Program / CVE List V5
Vulnerability Description
GitLab has remediated an issue in GitLab EE affecting all versions from 18.2 before 18.8.9, 18.9 before 18.9.5, and 18.10 before 18.10.3 that, in customizable analytics dashboards, could have allowed an authenticated user to execute arbitrary JavaScript in the context of other users' browsers due to improper input sanitization.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
GitLab 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GitLab是美国GitLab公司的一个端到端软件开发平台，具有内置的版本控制、问题跟踪、代码审查、CI/CD（持续集成和持续交付）等功能。 GitLab EE 18.8.9之前版本、18.9.5之前版本和18.10.3之前版本存在跨站脚本漏洞，该漏洞源于输入清理不当，可能导致经过身份验证的用户在其他用户的浏览器环境中执行任意JavaScript。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitLab GitLab 18.2 ~ 18.8.9 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-4332

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III. Intelligence Information for CVE-2026-4332

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Patches & Fixes for CVE-2026-4332 (1)

Other References for CVE-2026-4332 (1)

Same Patch Batch · GitLab · 2026-04-08 · 11 CVEs total

CVE-2026-5173 8.5 HIGH Exposed Dangerous Method or Function in GitLab
CVE-2026-1092 7.5 HIGH Improper Validation of Specified Quantity in Input in GitLab
CVE-2025-12664 7.5 HIGH Improper Validation of Specified Quantity in Input in GitLab
CVE-2026-1101 6.5 MEDIUM Improper Validation of Specified Quantity in Input in GitLab
CVE-2026-1516 5.7 MEDIUM Improper Control of Generation of Code ('Code Injection') in GitLab
CVE-2026-2619 4.3 MEDIUM Incorrect Authorization in GitLab
CVE-2026-2104 4.3 MEDIUM Authorization Bypass Through User-Controlled Key in GitLab
CVE-2026-1752 4.3 MEDIUM Incorrect Authorization in GitLab
CVE-2025-9484 4.3 MEDIUM Missing Authorization in GitLab
CVE-2026-4916 2.7 LOW Missing Authorization in GitLab

IV. Related Vulnerabilities

Same product: GitLab
Same vendor: GitLab
Same weakness: CWE-79

V. Comments for CVE-2026-4332

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