Vulnerability · Published Aug 20, 2026 · Assigned by VulnCheck

CVE-2026-77070n8n before 1.123.69 NoSQL Injection via MongoDB Node

High 7.1

In plain English

A high-severity security flaw in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities).

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.5%top 56.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

n8n before 1.123.69, 2.33.4, and 2.34.1 contains a NoSQL injection vulnerability in the MongoDB node's Find, Delete, and Aggregate operations, which parse the Query parameter as JSON after expression resolution without sanitizing MongoDB operators. An attacker who can influence the resolved query (e.g., via externally-controlled data) can inject operators such as $ne or $where, turning an intended single-document lookup into full-collection disclosure, full-collection deletion, or other operations on the database server.

Affected products (as reported)

Vendor	Product	Versions
n8n-io	n8n	0 – before 1.123.69
n8n-io	n8n	2.34.0 – before 2.34.1
n8n-io	n8n	2.0.0 – before 2.33.4

Weakness: CWE-943 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H

References

GitHub Security Advisory (GHSA-953p-jm2c-8h5j) vendor-advisory
VulnCheck Advisory: n8n before 1.123.69 NoSQL Injection via MongoDB Node third-party-advisory