A vulnerability was discovered in GitLab starting with version 12. GitLab was vulnerable to a blind SSRF attack since requests to shared address space were not blocked.
https://hackerone.com/reports/579934
https://gitlab.com/gitlab-org/gitlab/-/issues/29395
https://gitlab.com/gitlab-org/cves/-/blob/master/2022/CVE-2022-0249.json