GitLabCVE-2026-15723

GitLab has remediated an issue in GitLab CE/EE affecting all versions from 10.1...

CVE-2026-15723 · Published Oct 22, 2026 · updated Oct 27, 2026

High8.2

Fix: upgrade to 19.3.6 or later (3 fixed versions below)

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 versions

Package	Affected	Fixed in
GitLab Product	>= 10.1, < 19.3.6	19.3.6
	>= 19.4, < 19.4.3	19.4.3
	>= 19.5, < 19.5.1	19.5.1

Details and references

CVSS 3.1: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Severity from: the vendor (its own CVE record or advisory)
Weakness: CWE-90

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