CVE-2026-15723: GitLab 10.1 to before 19.3.6, 19.4 to before 19.4.3, 19.5 to before 19.5.1

Affected technology

GitLab · 10.1 to before 19.3.6, 19.4 to before 19.4.3, 19.5 to before 19.5.1
GitLab

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

The source says 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. Vendor/CNA’s CVSS 3.1 assessment (base score 8.2/10) rates confidentiality and integrity impact as high; availability impact as none.