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CVE-2026-18252— Inclusion of Functionality from Untrusted Control Sphere 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公司开源的一款源代码管理平台。 GitLab 18.9至19.1.7之前版本、19.2至19.2.5之前版本和19.3至19.3.1之前版本存在软件供应链问题漏洞，该漏洞源于Claude代理处理来自用户控制的源的配置，可能导致具有开发者角色权限的已认证用户在CI环境中执行任意命令。

CVSS 7.3 · High EPSS 0.42% · P34

Affected Version Matrix 3

VendorProduct Version RangeStatus
GitLab GitLab 18.9< 19.1.7 affected
19.2< 19.2.5 affected
19.3< 19.3.1 affected
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I. Basic Information for CVE-2026-18252

Vulnerability Information
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Vulnerability Title
Inclusion of Functionality from Untrusted Control Sphere in GitLab
Source: CVE Program / CVE List V5
Vulnerability Description
GitLab has remediated an issue in GitLab EE affecting all versions from 18.9 before 19.1.7, 19.2 before 19.2.5, and 19.3 before 19.3.1 that, under certain conditions, an authenticated user with developer-role permissions could have executed arbitrary commands in a CI context, due to the Claude agent processing configuration from a user-controlled source.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
从非可信控制范围包含功能例程
Source: CVE Program / CVE List V5
Vulnerability Title
GitLab 软件供应链问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GitLab是美国GitLab公司开源的一款源代码管理平台。 GitLab 18.9至19.1.7之前版本、19.2至19.2.5之前版本和19.3至19.3.1之前版本存在软件供应链问题漏洞，该漏洞源于Claude代理处理来自用户控制的源的配置，可能导致具有开发者角色权限的已认证用户在CI环境中执行任意命令。
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 18.9 ~ 19.1.7 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-18252

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III. Intelligence Information for CVE-2026-18252

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Patches & Fixes for CVE-2026-18252 (1)

Security Blog Posts for CVE-2026-18252 (1)

Vendor Pages for CVE-2026-18252 (1)

Same Patch Batch · GitLab · 2026-08-26 · 6 CVEs total

CVE-2026-77801 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in GitLab
CVE-2025-10903 6.5 MEDIUM Loop with Unreachable Exit Condition ('Infinite Loop') in GitLab
CVE-2026-3035 5.5 MEDIUM Authentication Bypass Using an Alternate Path or Channel in GitLab
CVE-2026-15387 4.3 MEDIUM Acceptance of Extraneous Untrusted Data With Trusted Data in GitLab
CVE-2026-7487 3.5 LOW Access Control Check Implemented After Asset is Accessed in GitLab

IV. Related Vulnerabilities

Same product: GitLab
Same vendor: GitLab
Same weakness: CWE-829

V. Comments for CVE-2026-18252

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