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CVE-2026-12910— Missing Authentication for Critical Function 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 已修复了 GitLab CE/EE 中的一个问题，该问题影响以下版本：18.6 至 19.1.8 之前的所有版本、19.2 至 19.2.6 之前的版本，以及 19.3 至 19.3.2 之前的版本。在特定条件下，由于缺少对认证强制执行的检查，已认证的用户可能绕过 SAML SSO 登录限制，并在未使用 SSO 的情况下完成身份验证。

CVSS 5.4 · Medium

Affected Version Matrix 3

VendorProduct Version RangeStatus
GitLab GitLab 18.6< 19.1.8 affected
19.2< 19.2.6 affected
19.3< 19.3.2 affected
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I. Basic Information for CVE-2026-12910

Vulnerability Information
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Vulnerability Title
Missing Authentication for Critical Function in GitLab
Source: CVE Program / CVE List V5
Vulnerability Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.6 before 19.1.8, 19.2 before 19.2.6, and 19.3 before 19.3.2 that under certain conditions could have allowed an authenticated user to bypass SAML SSO sign-in restrictions and authenticate without SSO due to missing authentication enforcement checks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitLab GitLab 18.6 ~ 19.1.8 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-12910

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III. Intelligence Information for CVE-2026-12910

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Patches & Fixes for CVE-2026-12910 (1)

Same Patch Batch · GitLab · 2026-09-15 · 4 CVEs total

CVE-2026-88765 8.5 HIGH Improper Neutralization of Special Elements used in a Command ('Command Injection') in Git
CVE-2026-13210 7.7 HIGH Incorrect Authorization in GitLab
CVE-2026-82837 5.3 MEDIUM Insertion of Sensitive Information Into Sent Data in GitLab

IV. Related Vulnerabilities

Same product: GitLab
Same vendor: GitLab
Same weakness: CWE-306

V. Comments for CVE-2026-12910

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