CVE-2026-15723

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.

Score

CVSS 3.1 8.2 High

Status

Analyzed - cve@gitlab.com

Published

2026-10-21

Last modified

2026-10-27

Weaknesses

CWE-90

Affected products

• Gitlab (Gitlab)

References

• https://gitlab.com/gitlab-org/gitlab/-/work_items/605977
• https://hackerone.com/reports/3852192
• https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/