CVE-2026-86994 PUBLISHED

n8n: Cross-User Active Workflow ID and Lifecycle Event Disclosure via Missing userId Filter

Assigner: GitHub_M
Reserved: 08.09.2026 Published: 08.09.2026 Updated: 08.09.2026

n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the /rest/active-workflows endpoint returned every active workflow ID on the instance to any member regardless of sharing. Workflow activation, deactivation, and publication push events were also broadcast to clients that could not access the affected workflow, disclosing workflow IDs, version IDs, and activation error details. The affected paths include packages/cli/src/services/active-workflows.service.ts and packages/cli/src/workflows/workflow-push-notifier.service.ts. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.

Metrics

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N
CVSS Score: 5.3

Product Status

Vendor n8n-io
Product n8n
Versions
  • Version >= 2.38.0, < 2.38.2 is affected
  • Version >= 2.0.0, < 2.37.7 is affected
  • Version < 1.123.76 is affected

References

Problem Types

  • CWE-862: Missing Authorization CWE