ServiceNow BodySnatcher flaw enabled AI agent takeover via email address

Jan 2026

CVE-2025-12420 (CVSS 9.3) allowed unauthenticated attackers to impersonate any ServiceNow user using only an email address, bypassing MFA and SSO. Attackers could then execute Now Assist AI agents to override security controls and create backdoor admin accounts, described as the most severe AI-driven security vulnerability uncovered to date.