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CVE-2026-106119 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

No CVSS 3.x data is available for this CVE.

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/langchain-ai/langchainjs/commit/946e3d856ff1f8ce7f7b9374c83f680a6ada79af	[email protected]
https://github.com/langchain-ai/langchainjs/pull/11672	[email protected]
https://github.com/langchain-ai/langchainjs/releases/tag/@langchain/[email protected]	[email protected]
https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-m6rx-h84q-8r95	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-943	Improper Neutralization of Special Elements in Data Query Logic	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 6, 2026	CVE Modified	CISA-ADP
Oct 6, 2026	New CVE Received	[email protected]