Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-1090— 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。

CVSS 8.7 · High EPSS 0.23% · P13

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-1090

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

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 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: 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

Vendor Product Affected Versions CPE Subscribe
GitLab GitLab 10.6 ~ 18.7.6 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-1090

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-1090

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-1090 (1)

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

CVE-2026-1069 7.5 HIGH Uncontrolled Recursion in GitLab
CVE-2025-14513 7.5 HIGH Improper Validation of Specified Quantity in Input in GitLab
CVE-2025-13929 7.5 HIGH Allocation of Resources Without Limits or Throttling in GitLab
CVE-2025-13690 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in GitLab
CVE-2025-12576 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in GitLab
CVE-2026-3848 5.0 MEDIUM Improper Neutralization of CRLF Sequences ('CRLF Injection') in GitLab
CVE-2026-1732 4.3 MEDIUM Improper Removal of Sensitive Information Before Storage or Transfer in GitLab
CVE-2026-1663 4.3 MEDIUM Missing Authorization in GitLab
CVE-2026-0602 4.3 MEDIUM Authentication Bypass Using an Alternate Path or Channel in GitLab
CVE-2025-12555 4.3 MEDIUM Incorrect Authorization in GitLab
CVE-2026-1230 4.1 MEDIUM Use of Incorrectly-Resolved Name or Reference in GitLab
CVE-2025-12704 3.5 LOW Missing Authorization in GitLab
CVE-2025-12697 2.2 LOW Improper 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

No comments yet

Leave a comment