CVE-2026-55253

A NoSQL injection vulnerability in the langgraph-checkpoint-mongodb (< 0.3.0) and langgraph-store-mongodb (

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...

CVE-2026-48121 @langchain/langgraph-checkpoint-mongodb: NoSQL parameter injection in MongoDBSaver allows cross-tenant state access

@langchain/langgraph-checkpoint-mongodb provides a LangGraph.js CheckpointSaver implementation that uses MongoDB for storage. Versions 1.3.0 and below are vulnerable to NoSQL injection: checkpoint identifiers threadid, checkpointns, checkpointid from config.configurable are passed into MongoDB fi...

CVE-2026-48121

The CVE-2026-48121 vulnerability affects @langchain/langgraph-checkpoint-mongodb (MongoDBSaver) and involves NoSQL parameter injection in MongoDB queries. Versions 1.3.0 and earlier pass checkpoint identifiers (thread_id, checkpoint_ns, checkpoint_id) from config.configurable directly into MongoD...

CVE-2026-48121

@langchain/langgraph-checkpoint-mongodb provides a LangGraph.js CheckpointSaver implementation that uses MongoDB for storage. Versions 1.3.0 and below are vulnerable to NoSQL injection: checkpoint identifiers threadid, checkpointns, checkpointid from config.configurable are passed into MongoDB fi...

CVE-2026-48121 @langchain/langgraph-checkpoint-mongodb: NoSQL parameter injection in MongoDBSaver allows cross-tenant state access

@langchain/langgraph-checkpoint-mongodb provides a LangGraph.js CheckpointSaver implementation that uses MongoDB for storage. Versions 1.3.0 and below are vulnerable to NoSQL injection: checkpoint identifiers threadid, checkpointns, checkpointid from config.configurable are passed into MongoDB fi...

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...

PT-2026-48932

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...