Gitea versions up to and including 1.26.1 do not enforce repository-unit authorization on issue-template API endpoints.
https://github.com/go-gitea/gitea/security/advisories/GHSA-3fwp-p5rj-2pxf
https://github.com/go-gitea/gitea/releases/tag/v1.26.2
https://github.com/go-gitea/gitea/pull/37781