CVE-2026-106119

The record

LangChain is a framework for building LLM-powered applications. Prior to 1.3.1, MongoDBChatMessageHistory does not enforce the documented string type for an untrusted structured session identifier at runtime, allowing the identifier to be interpreted as a MongoDB query condition rather than as a literal value when multiple users' histories are stored in a shared MongoDB collection. An attacker able to invoke chat-history operations can read, modify, or delete another user's stored conversation. Applications using authenticated, server-controlled string identifiers are not affected. This issue is fixed in version 1.3.1.

Affected packages

Related vulnerabilities

• CVE-2026-105799 LangChain is a framework for building LLM-powered applications. CWE-943
• CVE-2026-88029 Improper neutralization of special elements in data query logic in the GridFS component… CWE-943
• CVE-2026-88030 Improper neutralization of special elements in data query logic in the GridFS component… CWE-943
• CVE-2026-85167 n8n before 2.35.4 and 2.36.x before 2.36.2 contain a query injection vulnerability in the… CWE-943
• CVE-2026-63138 Improper Neutralization of Special Elements in Data Query Logic (CWE-943) in Kibana can… CWE-943
• CVE-2026-79483 FastGPT Community Edition 4.10.0 through 4.14.0 are vulnerable to a NoSQL injection in… CWE-943
• CVE-2026-78691 Improper Neutralization of Special Elements in Data Query Logic vulnerability in… CWE-943
• CVE-2026-77846 Improper Neutralization of Special Elements in Data Query Logic vulnerability in… CWE-943