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CVE-2026-4868— Authorization Bypass Through User-Controlled Key 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 18.8版本至18.10.7之前版本、18.11版本至18.11.4之前版本和19.0版本至19.0.1之前版本存在安全漏洞，该漏洞源于用户身份解析不当，可能导致认证用户在特定条件下以其他用户身份运行Duo AI工作流。

CVSS 8.2 · High EPSS 0.34% · P27

Affected Version Matrix 3

VendorProduct Version RangeStatus
GitLab GitLab 18.8< 18.10.7 affected
18.11< 18.11.4 affected
19.0< 19.0.1 affected
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I. Basic Information for CVE-2026-4868

Vulnerability Information
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Vulnerability Title
Authorization Bypass Through User-Controlled Key in GitLab
Source: CVE Program / CVE List V5
Vulnerability Description
GitLab has remediated an issue in GitLab EE affecting all versions from 18.8 before 18.10.7, 18.11 before 18.11.4, and 19.0 before 19.0.1 that, under certain conditions, could have allowed an authenticated user to cause specific Duo AI workflows to run under another user's identity due to improper user identity resolution when triggering Duo AI workflow runners.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
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 18.8版本至18.10.7之前版本、18.11版本至18.11.4之前版本和19.0版本至19.0.1之前版本存在安全漏洞，该漏洞源于用户身份解析不当，可能导致认证用户在特定条件下以其他用户身份运行Duo AI工作流。
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 18.8 ~ 18.10.7 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-4868

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III. Intelligence Information for CVE-2026-4868

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Patches & Fixes for CVE-2026-4868 (1)

Other References for CVE-2026-4868 (1)

Same Patch Batch · GitLab · 2026-05-27 · 6 CVEs total

CVE-2026-1402 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in GitLab
CVE-2026-6713 5.3 MEDIUM Incorrect Authorization in GitLab
CVE-2026-8716 4.3 MEDIUM Use of Incorrectly-Resolved Name or Reference in GitLab
CVE-2026-5296 4.3 MEDIUM Missing Authorization in GitLab
CVE-2026-2601 4.3 MEDIUM Missing Authorization in GitLab

IV. Related Vulnerabilities

Same product: GitLab
Same vendor: GitLab
Same weakness: CWE-639

V. Comments for CVE-2026-4868

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