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.

CVSS 3.1

8.2CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

EPSS

0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-25)

CWE

CWE-90

Published

2026-10-22

Modified

2026-10-23

Record from

the NVD, synced 2026-10-23

References

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

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