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CVE-2026-15387— Acceptance of Extraneous Untrusted Data With Trusted Data 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 19.1.7版本之前的19.1版本、19.2.5版本之前的19.2版本和19.3.1版本之前的19.3版本存在信任管理问题漏洞，该漏洞源于对作业依赖的处理不当，可能导致具有开发者角色的已认证用户影响Pipeline Execution Policy强制执行作业的执行环境。

CVSS 4.3 · Medium EPSS 0.21% · P10

Affected Version Matrix 3

VendorProduct Version RangeStatus
GitLab GitLab 19.1< 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-2026-15387

Vulnerability Information
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Vulnerability Title
Acceptance of Extraneous Untrusted Data With Trusted Data in GitLab
Source: CVE Program / CVE List V5
Vulnerability Description
GitLab has remediated an issue in GitLab EE affecting all versions from 19.1 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 influenced the execution environment of Pipeline Execution Policy enforcement jobs, due to improper handling of job dependencies.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在可信数据中接受外来的不可信数据
Source: CVE Program / CVE List V5
Vulnerability Title
GitLab 信任管理问题漏洞
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 19.1.7版本之前的19.1版本、19.2.5版本之前的19.2版本和19.3.1版本之前的19.3版本存在信任管理问题漏洞，该漏洞源于对作业依赖的处理不当，可能导致具有开发者角色的已认证用户影响Pipeline Execution Policy强制执行作业的执行环境。
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 19.1 ~ 19.1.7 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-15387

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III. Intelligence Information for CVE-2026-15387

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Patches & Fixes for CVE-2026-15387 (1)

Other References for CVE-2026-15387 (2)

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

CVE-2026-18252 7.3 HIGH Inclusion of Functionality from Untrusted Control Sphere in GitLab
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-2026-7487 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-349

V. Comments for CVE-2026-15387

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