> CVE-2026-55253 [HIGH]

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PUBLISHED
2026-09-14 18:17
MODIFIED
2026-09-14 18:17
CVSS_SCORE V3
7.7
EPSS (Prob. Exploit)
0.53%
Top 56.4%
DATA SOURCES:
NVD đź”— 2026-09-14 CWE MITRE đź”— 2026-10-01 FIRST EPSS đź”— 2026-10-18 GITHUB đź”— 2026-09-21 OSV đź”— 2026-10-26

> DESCRIPTION

LangChain MongoDB provides integrations between MongoDB, Atlas, LangChain, and LangGraph. Prior to langgraph-checkpoint-mongodb 0.3.0 and langgraph-store-mongodb 0.4.0, MongoDBSaver.list(), MongoDBSaver.alist(), and MongoDBStore.search() incorporate filter dictionaries into MongoDB queries without recursively rejecting keys prefixed with $. An authenticated caller who controls a filter argument through HTTP query parameters, request body fields, or agent tool arguments can inject MongoDB Query Language operators such as $regex or $where. In a multi-tenant deployment that uses the filter to enforce per-user or per-tenant isolation, injected operators can bypass intended equality filtering and expose other tenants' checkpoint or store data. Filters constructed entirely from trusted server-side values have lower practical risk. This issue is fixed in langgraph-checkpoint-mongodb 0.3.0 and langgraph-store-mongodb 0.4.0.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
EXPLOITABILITY
3.1
IMPACT
4.0

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
Low (L)
Authentifié avec compte utilisateur basique
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Changed (C)
Impact s'étend au-delà du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
None (N)
Aucune interruption de service

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
None
Aucune interruption de service

> WEAKNESSES

CWE-943

> CWE DETAILED DESCRIPTIONS

CWE-943: Improper Neutralization of Special Elements in Data Query Logic - The product generates a query intended to access or manipulate data in a data store such as a database, but it does not neutralize or incorrectly neutralizes special elements that can modify the intended logic of the query.

> GITHUB SECURITY ADVISORY

GHSA-533j-2v4q-mw5h HIGH

LangChain MongoDB has NoSQL Operator Injection in MongoDBSaver.list() leading to cross-tenant data exposure

AFFECTED PACKAGES:
PIP / langgraph-store-mongodb
< 0.4.0
Fixed in: 0.4.0
PIP / langgraph-checkpoint-mongodb
< 0.3.0
Fixed in: 0.3.0

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

LangChain MongoDB: NoSQL Operator Injection in MongoDBSaver.list() leading to cross-tenant data exposure

AFFECTED PACKAGES:
Unknown / Unknown
4 versions affected
ALIASES:
GHSA-533j-2v4q-mw5h, PYSEC-2026-3859, PYSEC-2026-3860

> HISTORIQUE DES MODIFICATIONS

Première apparition
14/09/2026 18:17
Source: NVD
📊 ENRICHISSEMENT 01/10/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-943: Improper Neutralization of Special Elements in Data Query Logic - The product generates a query intended to access or manipulate data in a data store such as a database, but it does not neutr...
Total des modifications: 1 Dernière mise à jour: 3 weeks ago

> REFERENCES

https://github.com/langchain-ai/langchain-mongodb/commit/14a6cc39e67d23fd409cd13...
https://github.com/langchain-ai/langchain-mongodb/commit/240e7ecee432ea006d9fef6...
https://github.com/langchain-ai/langchain-mongodb/commit/5465e4d3ea0ef5c88a666a6...
https://github.com/langchain-ai/langchain-mongodb/pull/384
https://github.com/langchain-ai/langchain-mongodb/releases/tag/libs/langgraph-ch...
https://github.com/langchain-ai/langchain-mongodb/releases/tag/libs/langgraph-st...
https://github.com/langchain-ai/langchain-mongodb/security/advisories/GHSA-533j-...
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