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Vulnerability · Published Oct 21, 2026 · Assigned by GitLab

CVE-2026-15723Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection') in GitLab

High 8.2

In plain English

A high-severity security flaw in GitLab from GitLab. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities).

Severity (CVSS 3.1)8.2High
Exploit odds (30 days)0.5%top 54.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
GitLab GitLab 10.1 – before 19.3.619.4 – before 19.4.319.5 – before 19.5.1

Weakness: CWE-90 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

References