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CVE-2026-6896— 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公司开源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 13.11版本至18.11.7之前版本、19.0版本至19.0.4之前版本和19.1版本至19.1.2之前版本存在跨站脚本漏洞，该漏洞源于对用户提供的输入清理不当，可能导致具有开发者角色权限的身份验证用户在另一个用户的浏览器会话中执行任意脚本。

CVSS 8.7 · High EPSS 0.40% · P32

Affected Version Matrix 3

VendorProduct Version RangeStatus
GitLab GitLab 13.11< 18.11.7 affected
19.0< 19.0.4 affected
19.1< 19.1.2 affected
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I. Basic Information for CVE-2026-6896

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 13.11 before 18.11.7, 19.0 before 19.0.4, and 19.1 before 19.1.2 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary scripts in another user's browser session due to improper sanitization of user-supplied input.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/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公司开源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 13.11版本至18.11.7之前版本、19.0版本至19.0.4之前版本和19.1版本至19.1.2之前版本存在跨站脚本漏洞，该漏洞源于对用户提供的输入清理不当，可能导致具有开发者角色权限的身份验证用户在另一个用户的浏览器会话中执行任意脚本。
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 13.11 ~ 18.11.7 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-6896

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III. Intelligence Information for CVE-2026-6896

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Patches & Fixes for CVE-2026-6896 (2)

Same Patch Batch · GitLab · 2026-07-08 · 7 CVEs total

CVE-2026-13320 7.3 HIGH Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2026-11827 4.9 MEDIUM Insufficiently Protected Credentials in GitLab
CVE-2026-8472 4.3 MEDIUM Missing Authorization in GitLab
CVE-2026-7492 4.3 MEDIUM Missing Authorization in GitLab
CVE-2025-12506 3.5 LOW Use of Incorrectly-Resolved Name or Reference in GitLab
CVE-2026-6352 2.7 LOW Incorrect Authorization in GitLab

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-6896

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