
The very mechanism designed to streamline communication within LangChain applications has been discovered to harbor a high-severity vulnerability that could allow attackers to dismantle security from the inside out. This research summary addresses a critical serialization injection flaw, codenamed “LangGrinch” (CVE-2025-68664), located deep within the LangChain Core Python package. With a CVSS score of 9.3, this vulnerability highlights how an










