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CVE-2026-5816— Improper Resolution of Path Equivalence 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 CE/EE 18.10.4之前版本和18.11.1之前版本存在安全漏洞，该漏洞源于特定条件下路径验证不当，可能导致未经身份验证的用户在用户浏览器会话中执行任意JavaScript。

CVSS 8.0 · High EPSS 0.59% · P46
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I. Basic Information for CVE-2026-5816

Vulnerability Information
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Vulnerability Title
Improper Resolution of Path Equivalence in GitLab
Source: CVE Program / CVE List V5
Vulnerability Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.10 before 18.10.4 and 18.11 before 18.11.1 that could have allowed an unauthenticated user to execute arbitrary JavaScript in a user's browser session due to improper path validation under certain conditions.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径等价的解析不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
GitLab 安全漏洞
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 CE/EE 18.10.4之前版本和18.11.1之前版本存在安全漏洞，该漏洞源于特定条件下路径验证不当，可能导致未经身份验证的用户在用户浏览器会话中执行任意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 18.10 ~ 18.10.4 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-5816

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III. Intelligence Information for CVE-2026-5816

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Patches & Fixes for CVE-2026-5816 (1)

Same Patch Batch · GitLab · 2026-04-22 · 11 CVEs total

CVE-2026-4922 8.1 HIGH Cross-Site Request Forgery (CSRF) in GitLab
CVE-2026-5262 8.0 HIGH Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2025-0186 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in GitLab
CVE-2025-3922 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in GitLab
CVE-2025-6016 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in GitLab
CVE-2026-1660 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in GitLab
CVE-2026-6515 5.4 MEDIUM Insufficient Session Expiration in GitLab
CVE-2026-5377 4.3 MEDIUM Incorrect Authorization in GitLab
CVE-2026-3254 3.5 LOW Improper Restriction of Rendered UI Layers or Frames in GitLab
CVE-2025-9957 2.7 LOW Incorrect Authorization in GitLab

IV. Related Vulnerabilities

Same product: GitLab
Same vendor: GitLab
Same weakness: CWE-41

V. Comments for CVE-2026-5816

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