Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gitlab | Gitlab | >= 10.1.0, < 19.3.6 |
Related Weaknesses (CWE)
References
- https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/Release NotesVendor Advisory
- https://gitlab.com/gitlab-org/gitlab/-/work_items/605977Permissions Required
- https://hackerone.com/reports/3852192Permissions Required
FAQ
What is CVE-2026-15723?
CVE-2026-15723 is a vulnerability with a CVSS score of 8.2 (HIGH). 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 enabl...
How severe is CVE-2026-15723?
CVE-2026-15723 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-15723?
Check the references section above for vendor advisories and patch information. Affected products include: Gitlab Gitlab.