gcdRadar
archive/Patch now/AIR-2026-0248
closedclosed 6 Oct 2026Patch now2 Disclosed vulnerabilityAI

CVE-2026-106119: LangChain MongoDBChatMessageHistory Query Injection

LangChain

MongoDBChatMessageHistory failed to enforce string types on session identifiers, allowing query condition injection. Attackers could access or modify conversation histories belonging to other users.

disclosed CVENo confirmed exploitation, so this record is tracked as a disclosed vulnerability and not counted as an incident. It moves into the counts if CISA or the vendor confirms exploitation. Why

CVSS
6.0
EPSS
<0.01 · top 60% · 2026-11-13
EPSS scores by FIRST
fix status
Fix status unknown
first report
6 Oct 2026
last update
6 Oct 2026
CVE ids
CVE-2026-106119other records

Timeline · 1

  1. 6 Oct 2026CVE-2026-106119: LangChain is a framework for building LLM-powered applications.

Sources · 1

Advisories and databases

  1. 2026-10-06
    CVE-2026-106119: LangChain is a framework for building LLM-powered applications.
    NVD · nvd.nist.gov/vuln/detail/CVE-2026-106119

Titles and links belong to their publishers. The summary above is written by gcdRadar in its own words; data is CC BY-SA 4.0.

Classification

lane
Patch now
AI role
Attack on AI
categories
Infrastructure vulnerabilityData leak
severity
2 · Disclosed vulnerability
fix status
Fix status unknown
targets
Framework / tooling
owasp llm top 10
LLM02:2025 Sensitive Information DisclosureLLM03:2025 Supply Chain
mitre atlas
no technique for these categories
tags
mongodbquery-injection
dates
happened 6 Oct 2026 · first reported 6 Oct 2026
origin
NVD
Vulnerability record from NVD / the GitHub Advisory Database. This product uses the NVD API but is not endorsed or certified by the NVD.
record
confidence 0.95 · created 2026-10-18 06:33Z · updated 2026-10-18 06:33Z

Lane, AI role, categories and severity come from the classifier; the OWASP and ATLAS rows are derived from the categories. How these are assigned

Copy a brief

This record as a short Markdown brief, for a ticket, a chat or a coding agent.

the brief as text
# CVE-2026-106119: LangChain MongoDBChatMessageHistory Query Injection

https://gcdradar.vercel.app/incidents/cve-2026-106119-langchain-mongodbchatmessagehistory-query-in · AIR-2026-0248 · closed 2026-10-06

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-10-06
- AI role: Attack on AI
- Products: LangChain
- CVE ids: CVE-2026-106119
- CVSS: 6

## Summary

MongoDBChatMessageHistory failed to enforce string types on session identifiers, allowing query condition injection. Attackers could access or modify conversation histories belonging to other users.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-10-06: CVE-2026-106119: LangChain is a framework for building LLM-powered applications. (https://nvd.nist.gov/vuln/detail/CVE-2026-106119)

## Sources

- 2026-10-06 NVD: CVE-2026-106119: LangChain is a framework for building LLM-powered applications. https://nvd.nist.gov/vuln/detail/CVE-2026-106119

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.

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