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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 已修复 GitLab EE 中的一个问题。该问题影响了 19.1 至 19.1.7 之前、19.2 至 19.2.5 之前以及 19.3 至 19.3.1 之前的所有版本。在特定条件下，拥有开发者角色权限的已认证用户可能因任务依赖关系处理不当，从而对“Pipeline Execution Policy”执行任务的执行环境产生干扰或影响。

CVSS 4.3 · Medium

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

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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