CVE-2026-16764: OWASP DefectDojo REST API flaw lets low-privilege users escalate to superuser via is_staff
A privilege escalation flaw, CVE-2026-16764 (GHSA-w2j3-x3j3-mm43, CVSS 3.1 7.8, CWE-269), affects OWASP DefectDojo. The REST API UserSerializer validates changes to issuperuser but not to isstaff. An authenticated user holding only the delegated auth.changeuser permission can therefore make themselves staff and then become superuser throu…