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CVE-2026-1090— Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab

CVSS 8.7 · High EPSS 0.07% · P22
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I. Basic Information for CVE-2026-1090

Vulnerability Information
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Vulnerability Title
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in GitLab
Source: NVD (National Vulnerability Database)
Vulnerability Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.6 before 18.7.6, 18.8 before 18.8.6, and 18.9 before 18.9.2 that could have allowed an authenticated user, when the `markdown_placeholders` feature flag was enabled, to inject JavaScript in a browser due to improper sanitization of placeholder content in markdown processing.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
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存在跨站脚本漏洞，该漏洞源于markdown处理中占位符内容清理不当，可能导致经过身份验证的用户在启用markdown_placeholders功能标志时在浏览器中注入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

VendorProductAffected VersionsCPESubscribe
GitLabGitLab 10.6 ~ 18.7.6 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-1090

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III. Intelligence Information for CVE-2026-1090

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Same Patch Batch · GitLab · 2026-03-11 · 14 CVEs total

CVE-2026-10697.5 HIGHUncontrolled Recursion in GitLab
CVE-2025-145137.5 HIGHImproper Validation of Specified Quantity in Input in GitLab
CVE-2025-139297.5 HIGHAllocation of Resources Without Limits or Throttling in GitLab
CVE-2025-136906.5 MEDIUMAllocation of Resources Without Limits or Throttling in GitLab
CVE-2025-125766.5 MEDIUMAllocation of Resources Without Limits or Throttling in GitLab
CVE-2026-38485.0 MEDIUMImproper Neutralization of CRLF Sequences ('CRLF Injection') in GitLab
CVE-2026-17324.3 MEDIUMImproper Removal of Sensitive Information Before Storage or Transfer in GitLab
CVE-2026-16634.3 MEDIUMMissing Authorization in GitLab
CVE-2026-06024.3 MEDIUMAuthentication Bypass Using an Alternate Path or Channel in GitLab
CVE-2025-125554.3 MEDIUMIncorrect Authorization in GitLab
CVE-2026-12304.1 MEDIUMUse of Incorrectly-Resolved Name or Reference in GitLab
CVE-2025-127043.5 LOWMissing Authorization in GitLab
CVE-2025-126972.2 LOWImproper Encoding or Escaping of Output in GitLab

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-1090

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