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CVE-2026-4523— Missing Authorization 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 已修复 GitLab CE/EE 中一个影响以下版本的漏洞：15.11 之前的所有版本、19.2.7 之前的 19.3 版本以及 19.4.1 之前的 19.4 版本。在特定条件下，由于 GraphQL API 中的授权机制执行不当，未经身份验证的用户可能能够读取包含敏感变量值的 CI/CD 作业日志（trace）内容。

CVSS 3.7 · Low

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-4523

Vulnerability Information
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Vulnerability Title
Missing Authorization in GitLab
Source: CVE Program / CVE List V5
Vulnerability Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 15.11 before 19.2.7, 19.3 before 19.3.3, and 19.4 before 19.4.1 that under certain conditions could have allowed an unauthenticated user to read CI/CD job trace contents containing sensitive variable values due to improper authorization enforcement in the GraphQL API.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitLab GitLab 15.11 ~ 19.2.7 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-4523

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III. Intelligence Information for CVE-2026-4523

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Patches & Fixes for CVE-2026-4523 (1)

Other References for CVE-2026-4523 (1)

Same Patch Batch · GitLab · 2026-09-29 · 4 CVEs total

CVE-2026-84739 8.7 HIGH Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2026-8937 4.3 MEDIUM Missing Authorization in GitLab
CVE-2026-10518 4.3 MEDIUM Incorrect Authorization in GitLab

IV. Related Vulnerabilities

Same product: GitLab
Same vendor: GitLab
Same weakness: CWE-862

V. Comments for CVE-2026-4523

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