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

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-10086— 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已认证用户在特定条件下在另一用户会话环境中执行任意客户端代码。以下版本受到影响：18.11.6之前版本的16.4.x版本、19.0.3之前版本的19.0.x版本和19.1.1之前版本的19.1.x版本。

CVSS 8.7 · High EPSS 0.35% · P26

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 3

VendorProduct Version RangeStatus
GitLab GitLab 16.4< 18.11.6 affected
19.0< 19.0.3 affected
19.1< 19.1.1 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-10086

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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 EE affecting all versions from 16.4 before 18.11.6, 19.0 before 19.0.3, and 19.1 before 19.1.1 that under certain conditions could have allowed an authenticated user with developer-role permissions to execute arbitrary client-side code in the context of another user's 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已认证用户在特定条件下在另一用户会话环境中执行任意客户端代码。以下版本受到影响：18.11.6之前版本的16.4.x版本、19.0.3之前版本的19.0.x版本和19.1.1之前版本的19.1.x版本。
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 16.4 ~ 18.11.6 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-10086

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-10086

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-10086 (1)

Other References for CVE-2026-10086 (1)

Same Patch Batch · GitLab · 2026-06-25 · 13 CVEs total

CVE-2026-12053 8.6 HIGH Insertion of Sensitive Information into Log File in GitLab
CVE-2026-10712 8.0 HIGH Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2026-5309 5.4 MEDIUM Authorization Bypass Through User-Controlled Key in GitLab
CVE-2026-11379 5.3 MEDIUM Incorrect Authorization in GitLab
CVE-2026-2238 5.3 MEDIUM Missing Authorization in GitLab
CVE-2026-8330 4.4 MEDIUM Insertion of Sensitive Information into Log File in GitLab
CVE-2026-5952 4.3 MEDIUM Incorrect Authorization in GitLab
CVE-2026-5796 4.3 MEDIUM Incorrect Authorization in GitLab
CVE-2026-1606 4.3 MEDIUM Improper Control of Generation of Code ('Code Injection') in GitLab
CVE-2026-0934 3.8 LOW Incorrect Authorization in GitLab
CVE-2026-3176 3.1 LOW Missing Authorization in GitLab
CVE-2026-12635 Reliance on Reverse DNS Resolution for a Security-Critical Action in GitLab

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-10086

No comments yet

Leave a comment