CVSS 7.5 (high) · published 2026-10-22
GitLab has remediated an issue in GitLab CE/EE affecting all versions from 18.3 before 19.3.6, 19.4 before 19.4.3, and 19.5 before 19.5.1 that, under certain conditions, an unauthenticated user could have poisoned a shared cache's OAuth/OIDC discovery document to redirect certain flows to an externally controlled server, due to improper trust of user-supplied values when constructing endpoint URLs in cached discovery responses.
Affected products (NVD): gitlab gitlab
Fixed in (NVD): 19.3.6, 19.4.3
Weakness: CWE-444
Source: NVD CVE-2026-112212
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