Authenticated collection disclosure via unescaped query interpolation
Published Sep 3, 2026 · Updated Sep 3, 2026
Query injection in n8n before 2.35.4 and 2.36.x before 2.36.2 allows remote authenticated users to read entire document collections. The Elasticsearch Document Get All and Firestore Document Query operations insert expression values into JSON text before parsing, so quotes and braces terminate the intended field and add query operators. An authenticated user must control an expression value reaching an affected node; exploitation expands a single-document lookup into a full-collection read.
Summary
What happened
Query injection in n8n before 2.35.4 and 2.36.x before 2.36.2 allows remote authenticated users to read entire document collections. The Elasticsearch Document Get All and Firestore Document Query operations insert expression values into JSON text before parsing, so quotes and braces terminate the intended field and add query operators. An authenticated user must control an expression value reaching an affected node; exploitation expands a single-document lookup into a full-collection read.
The record
- CVE
- CVE-2026-85167
- Published
- Sep 3, 2026
- Updated
- Sep 3, 2026
- Vendor
- n8n
- Product
- n8n
- Classifications
- CWE-943, T1213
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 3, 2026CVE publishedPublication date reported by the CVE source.
- Sep 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <2.35.4
- Affected versionversion=0 <2.36.2
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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