CVE-2026-55253 LangChain MongoDB: NoSQL Operator Injection in MongoDBSaver.list() leading to cross-tenant data exposure

LangChain MongoDB provides integrations between MongoDB, Atlas, LangChain, and LangGraph. Prior to langgraph-checkpoint-mongodb 0.3.0 and langgraph-store-mongodb 0.4.0, MongoDBSaver.list, MongoDBSaver.alist, and MongoDBStore.search incorporate filter dictionaries into MongoDB queries without...

CVE-2026-55253 LangChain MongoDB: NoSQL Operator Injection in MongoDBSaver.list() leading to cross-tenant data exposure

LangChain MongoDB provides integrations between MongoDB, Atlas, LangChain, and LangGraph. Prior to langgraph-checkpoint-mongodb 0.3.0 and langgraph-store-mongodb 0.4.0, MongoDBSaver.list, MongoDBSaver.alist, and MongoDBStore.search incorporate filter dictionaries into MongoDB queries without...

PYSEC-2026-3860 LangChain MongoDB has NoSQL Operator Injection in MongoDBSaver.list() leading to cross-tenant data exposure

Executive Summary A NoSQL injection issue exists in the langgraph-checkpoint-mongodb and langgraph-store-mongodb libraries. MongoDBSaver.list and MongoDBStore.search methods accept a filter parameter that is incorporated into MongoDB queries without sufficient validation. Because MongoDB query...

LangChain MongoDB has NoSQL Operator Injection in MongoDBSaver.list() leading to cross-tenant data exposure

Executive SummaryA NoSQL injection issue exists in the langgraph-checkpoint-mongodb andlanggraph-store-mongodb libraries. MongoDBSaver.list and MongoDBStore.search methodsaccept a filter parameter that is incorporated into MongoDB queries without sufficient validation.Because MongoDB query operat...

GHSA-533J-2V4Q-MW5H LangChain MongoDB has NoSQL Operator Injection in MongoDBSaver.list() leading to cross-tenant data exposure

Executive Summary A NoSQL injection issue exists in the langgraph-checkpoint-mongodb and langgraph-store-mongodb libraries. MongoDBSaver.list and MongoDBStore.search methods accept a filter parameter that is incorporated into MongoDB queries without sufficient validation. Because MongoDB query...

Improper Neutralization of Special Elements in Data Query Logic

Overview @langchain/langgraph-checkpoint-mongodb is a LangGraph Affected versions of this package are vulnerable to Improper Neutralization of Special Elements in Data Query Logic in the MongoDBSaver.getTuple function. An attacker can access checkpoint data belonging to other tenants by injecting...

GHSA-98XF-R82G-9MHX LangGraph has NoSQL parameter injection in MongoDBSaver, allowing cross-tenant state access

Summary A NoSQL injection vulnerability existed in MongoDBSaver where checkpoint identifier fields from config.configurable were used in MongoDB queries without strict type enforcement. In vulnerable versions, attacker-controlled object payloads for example MongoDB operators like $gt and $ne coul...