CVE-2026-15723
Published:October 21, 2026
Updated:October 23, 2026
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 Packages
https://github.com/gitlabhq/gitlabhq.git (GITHUB):
Affected version(s) >=v19.4.0-rc42 <v19.4.3Fix Suggestion:
Update to version v19.4.3https://github.com/gitlabhq/gitlabhq.git (GITHUB):
Affected version(s) >=v19.5.0-rc42 <v19.5.1Fix Suggestion:
Update to version v19.5.1https://github.com/gitlabhq/gitlabhq.git (GITHUB):
Affected version(s) >=v19.0.0-rc42 <v19.3.6Fix Suggestion:
Update to version v19.3.6Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.2
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Special Elements used in an LDAP Query ('LDAP Injection')
EPSS
Base Score:
0.33