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CVE-2026-15723— Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') 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 CE/EE 中的一个安全漏洞，该漏洞影响 10.1 至 19.3.6 之前的所有版本、19.4 至 19.4.3 之前的版本，以及 19.5 至 19.5.1 之前的版本。当同时启用 OmniAuth SAML 和 LDAP 自动关联功能时，由于 OmniAuth 身份关联过程中用于 LDAP 邮箱查找的路径存在输入过滤不当的问题，已认证用户可在无需目标用户任何交互的情况下，接管一个由 LDAP 支持的现有账户。

CVSS 8.2 · High
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I. Basic Information for CVE-2026-15723

Vulnerability Information
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Vulnerability Title
Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') in GitLab
Source: CVE Program / CVE List V5
Vulnerability Description
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.1 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, when OmniAuth SAML and LDAP auto-linking were both enabled, an authenticated user could have taken over an existing LDAP-backed account without any interaction from the targeted user, due to improper input sanitization in the LDAP email lookup path used during OmniAuth identity linking.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
LDAP查询中使用的特殊元素转义处理不恰当(LDAP注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
GitLab GitLab 10.1 ~ 19.3.6 cpe:2.3:a:gitlab:gitlab:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-15723

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III. Intelligence Information for CVE-2026-15723

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Vendor Pages for CVE-2026-15723 (1)

Same Patch Batch · GitLab · 2026-10-21 · 11 CVEs total

CVE-2026-112212 7.5 HIGH Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') in GitLab
CVE-2026-12664 6.8 MEDIUM Incorrect Authorization in GitLab
CVE-2026-16255 5.9 MEDIUM Incorrect Authorization in GitLab
CVE-2026-13319 4.3 MEDIUM Authorization Bypass Through User-Controlled Key in GitLab
CVE-2026-105777 4.3 MEDIUM Insertion of Sensitive Information Into Sent Data in GitLab
CVE-2026-112378 4.3 MEDIUM Use of Less Trusted Source in GitLab
CVE-2026-105711 3.5 LOW Use of Cache Containing Sensitive Information in GitLab
CVE-2026-14288 3.1 LOW Use of Incorrectly-Resolved Name or Reference in GitLab
CVE-2026-112326 3.1 LOW Improper Cleanup on Thrown Exception in GitLab
CVE-2026-103515 2.7 LOW Incorrect Authorization in GitLab

IV. Related Vulnerabilities

Same product: GitLab
Same vendor: GitLab
Same weakness: CWE-90

V. Comments for CVE-2026-15723

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