CVSS 8.2 (high) · published 2026-10-22
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 (NVD): gitlab gitlab
Fixed in (NVD): 19.3.6, 19.4.3
Weakness: CWE-90
Source: NVD CVE-2026-15723
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