CVEs / CVE-2026-106119
CVE-2026-106119
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 products · 1
| Product | Versions affected | Fixed in |
|---|---|---|
| LangChain | not stated by CPE | — |
Versions as NVD's CPE configuration states them; "—" means the record gives no fixed version, not that none exists. Check the vendor's advisory in the references.
In this registry
- LangChain — agent dossier
- LangChain Deep Agents — agent dossier
References · 4
- github.com/langchain-ai/langchainjs/commit/946e3d856ff1f8ce7f7b9374c83f680a6ada79af
- github.com/langchain-ai/langchainjs/pull/11672
- github.com/langchain-ai/langchainjs/releases/tag/@langchain/mongodb@1.3.1
- github.com/langchain-ai/langchainjs/security/advisories/GHSA-m6rx-h84q-8r95
The official record's references, as NVD lists them, minus any tagged Exploit. Nothing here is an exploit or a proof of concept.
Description, scores, versions and references are the official CVE record's own, retrieved 2026-10-25 from NVD. Category, attack surface and cross-links are this registry's classification and can be wrong — use the button above. Not a severity assessment for your deployment.