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CVE-2026-6883— 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 EE 18.9.7之前版本、18.10.6之前版本和18.11.3之前版本存在安全漏洞，该漏洞源于对孤立策略记录清理不当，可能导致经过身份验证的用户绕过合并请求批准要求。

CVSS 2.6 · Low EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 3

VendorProduct Version RangeStatus
GitLab GitLab 15.7< 18.9.7 affected
18.10< 18.10.6 affected
18.11< 18.11.3 affected
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I. Basic Information for CVE-2026-6883

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 EE affecting all versions from 15.7 before 18.9.7, 18.10 before 18.10.6, and 18.11 before 18.11.3 that could have allowed an authenticated user to bypass merge request approval requirements due to improper cleanup of orphaned policy records.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
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 EE 18.9.7之前版本、18.10.6之前版本和18.11.3之前版本存在安全漏洞，该漏洞源于对孤立策略记录清理不当，可能导致经过身份验证的用户绕过合并请求批准要求。
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 15.7 ~ 18.9.7 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-6883

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III. Intelligence Information for CVE-2026-6883

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Patches & Fixes for CVE-2026-6883 (1)

Other References for CVE-2026-6883 (1)

Same Patch Batch · GitLab · 2026-05-14 · 24 CVEs total

CVE-2026-7481 8.7 HIGH Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2026-7377 8.7 HIGH Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2026-6073 8.7 HIGH Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2025-14869 7.5 HIGH Improper Validation of Specified Quantity in Input in GitLab
CVE-2025-14870 7.5 HIGH Allocation of Resources Without Limits or Throttling in GitLab
CVE-2026-1659 7.5 HIGH Allocation of Resources Without Limits or Throttling in GitLab
CVE-2026-1322 6.8 MEDIUM Business Logic Errors in GitLab
CVE-2026-8280 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in GitLab
CVE-2026-1184 6.5 MEDIUM Deserialization of Untrusted Data in GitLab
CVE-2026-4527 6.5 MEDIUM Cross-Site Request Forgery (CSRF) in GitLab
CVE-2026-4524 6.5 MEDIUM Authentication Bypass Using an Alternate Path or Channel in GitLab
CVE-2026-3160 5.8 MEDIUM Unintended Proxy or Intermediary ('Confused Deputy') in GitLab
CVE-2026-6335 5.4 MEDIUM Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Gi
CVE-2025-12669 5.4 MEDIUM Improper Control of Generation of Code ('Code Injection') in GitLab
CVE-2026-3074 4.3 MEDIUM Authorization Bypass Through User-Controlled Key in GitLab
CVE-2026-3073 4.3 MEDIUM Authorization Bypass Through User-Controlled Key in GitLab
CVE-2026-8144 4.3 MEDIUM Missing Authorization in GitLab
CVE-2026-1338 4.3 MEDIUM Authorization Bypass Through User-Controlled Key in GitLab
CVE-2026-3607 4.3 MEDIUM Access Control Check Implemented After Asset is Accessed in GitLab
CVE-2026-6063 4.3 MEDIUM Authorization Bypass Through User-Controlled Key in GitLab

Showing top 20 of 24 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-6883

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