CVE-2026-6552

HIGH

Authorization Bypass Through User-Controlled Key in GitLab

Title source: cna
STIX 2.1

Description

GitLab has remediated an issue in GitLab EE affecting all versions from 15.5 before 18.10.8, 18.11 before 18.11.5, and 19.0 before 19.0.2 that under certain conditions could have allowed an authenticated user with group Owner role to take over another group member's GitLab account due to improper authorization in the Group SAML identity management functionality.

References (3)

Core 3

Scores

CVSS v3 8.7
EPSS 0.0047
EPSS Percentile 36.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-639
Status published
Products (4)
GitLab/GitLab 15.5 - 18.10.8
gitlab/gitlab 15.5.0 - 18.10.8 (2 CPE variants)
GitLab/GitLab 18.11 - 18.11.5
GitLab/GitLab 19.0 - 19.0.2
Published Jun 11, 2026
Tracked Since Jun 11, 2026