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CVE-2026-3035— Authentication Bypass Using an Alternate Path or Channel 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 中影响所有 11.3 至 19.1.7 之前、19.2 至 19.2.5 之前以及 19.3 至 19.3.1 之前的版本中的问题。在特定条件下，拥有项目维护者（Maintainer）权限的已认证用户可能因授权检查不当，而能够访问他们未被授权使用的受保护环境的终端。

CVSS 5.5 · Medium

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 3

VendorProduct Version RangeStatus
GitLab GitLab 11.3< 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-2026-3035

Vulnerability Information
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Vulnerability Title
Authentication Bypass Using an Alternate Path or Channel in GitLab
Source: CVE Program / CVE List V5
Vulnerability Description
GitLab has remediated an issue in GitLab EE affecting all versions from 11.3 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 project Maintainer permissions could have accessed the terminal of a protected environment they were not authorized to use due to improper authorization checks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用候选路径或通道进行的认证绕过
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitLab GitLab 11.3 ~ 19.1.7 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-3035

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III. Intelligence Information for CVE-2026-3035

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Patches & Fixes for CVE-2026-3035 (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-2026-15387 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-288

V. Comments for CVE-2026-3035

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