AUGUST 16, 2026
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Case File

CVE-2026-48121

MEDIUM · CVSS 6.7 EPSS 0.23% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-04 · Last synced 2026-08-16

CyberRota Analysis

AI-Generated

Versions 1.3.0 and below of the @langchain/langgraph-checkpoint-mongodb package are vulnerable to NoSQL injection due to improper handling of checkpoint identifiers in MongoDB queries, allowing attackers to manipulate queries and access sensitive data across tenants. Applications that pass untrusted input into the configuration without proper validation or type enforcement are at risk, particularly in multi-tenant environments. Users of affected versions should prioritize upgrading to version 1.3.1 to mitigate this vulnerability.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-48121
Severity
MEDIUM
CVSS
6.7
EPSS
0.23%
MongoDB

Original NVD Description

@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 (thread_id, checkpoint_ns, checkpoint_id) from config.configurable are passed into MongoDB find() queries in MongoDBSaver.getTuple() without type enforcement. If an attacker supplies an object payload (such as MongoDB operators $gt or $ne) instead of a string, it can be interpreted as a query operator, bypassing thread scoping and leaking checkpoints, including pending writes, across tenants. Applications are at risk if they forward untrusted input into config.configurable without coercing it to strings or validating it against a schema, particularly in multi-tenant or user-isolated setups. Apps that only use server-issued, string-typed identifiers with schema validation rejecting non-string fields are not affected. This issue has been fixed in version 1.3.1.