@langchain/langgraph-checkpoint-mongodb: NoSQL parameter injection in MongoDBSaver allows cross-tenant state access

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-48121
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-04 17:16:55 UTC
Updated2026-08-04 20:16:51 UTC
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.

Risk And Classification

Primary CVSS: v3.1 6.7 MEDIUM from [email protected]

CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

EPSS: 0.002290000 probability, percentile 0.137650000 (date 2026-08-06)

Problem Types: CWE-943 | CWE-943 CWE-943: Improper Neutralization of Special Elements in Data Query Logic

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.7MEDIUMCVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
3.1CNADECLARED6.7MEDIUMCVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Langchain-ai Langgraphjs affected < 1.3.1 Not specified

References

ReferenceSourceLinkTags
github.com/langchain-ai/langgraphjs/commit/284226c7ca164b3c81fe2d9e32b10... [email protected] github.com
github.com/langchain-ai/langgraphjs/security/advisories/GHSA-98xf-r82g-9mhx [email protected] github.com
github.com/langchain-ai/langgraphjs/issues/2351 [email protected] github.com
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