Vulnerability · Published Sep 3, 2026 · Assigned by VulnCheck

CVE-2026-85167n8n before 2.36.2 Query Injection via Elasticsearch Firestore Nodes

Medium 6.3

In plain English

A medium-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 0.4% (higher than 34% of all known vulnerabilities).

Severity (CVSS 4.0)6.3Medium

Exploit odds (30 days)0.4%top 65.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

n8n before 2.35.4 and 2.36.x before 2.36.2 contain a query injection vulnerability in the Elasticsearch Document Get All and Google Cloud Firestore Document Query operations, which build their JSON query by interpolating expression values directly into the query string before parsing. A value containing quote and brace characters can close the intended field and introduce new query operators, turning an intended single-document lookup into a full-collection read.

Affected products (as reported)

Vendor	Product	Versions
n8n-io	n8n	2.36.0 – before 2.36.2
n8n-io	n8n	0 – before 2.35.4

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

References

GitHub Security Advisory (GHSA-wxwj-8wv6-vpw2) vendor-advisory
VulnCheck Advisory: n8n before 2.36.2 Query Injection via Elasticsearch Firestore Nodes third-party-advisory