CVE-2026-106119
CVE-2026-106119 · LangChain: MongoDBChatMessageHistory query injection can allow cross-session access
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 6.0 · Medium · EPSS 0.5% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
langchainjs
- Versions
- < 1.5.14: Affected
No fix published
mongodb
- Versions
- < 1.3.1: Affected
No fix published
@langchain/mongodb npm
- Affected ranges
- SEMVER: < 1.3.1
Update to 1.3.1
Original sources
- https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-m6rx-h84q-8r95
- https://github.com/langchain-ai/langchainjs/pull/11672
- https://github.com/langchain-ai/langchainjs/commit/946e3d856ff1f8ce7f7b9374c83f680a6ada79af
- https://github.com/langchain-ai/langchainjs/releases/tag/@langchain/[email protected]
- https://nvd.nist.gov/vuln/detail/CVE-2026-106119