F5 Labs: Persona Bullying jailbreak and LangChain serialization injection flaw (CVE-2025-68664) show AI attacks converging with classic exploits
F5 Labs' January 2026 AI security roundup covers two attack developments: the Persona Bullying jailbreak and a critical LangChain serialization injection vulnerability (CVE-2025-68664) reachable through prompt injection. Persona Bullying applies human social-engineering tactics such as gaslighting, ridicule and social pressure to LLMs con…