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EUVD-2026-246364

2026-10-16T23:16:21.098432+00:00

EUVD-2026-246364

fkie_cve-2025-49595

2026-10-16T23:16:21.098463+00:00

n8n is a workflow automation platform. Prior to version 1.99.0, there is a denial of Service vulnerability in /rest/binary-data endpoint when processing empty filesystem URIs (filesystem:// or filesystem-v2://). This allows authenticated attackers to cause service unavailability through malformed filesystem URI requests, effecting the /rest/binary-data endpoint and n8n.cloud instances (confirmed HTTP/2 524 timeout responses). Attackers can exploit this by sending GET requests with empty filesystem URIs (filesystem:// or filesystem-v2://) to the /rest/binary-data endpoint, causing resource exhaustion and service disruption. This issue has been patched in version 1.99.0.

GHSA-pr9r-gxgp-9rm8 — n8n Vulnerable to Denial of Service via Malformed Binary Data Requests

2026-10-16T23:16:21.098494+00:00

Affected: npm: n8n

## Summary Denial of Service vulnerability in `/rest/binary-data` endpoint when processing empty filesystem URIs (`filesystem://` or `filesystem-v2://`).

### Impact This is a Denial of Service (DoS) vulnerability that allows authenticated attackers to cause service unavailability through malformed filesystem URI requests. The vulnerability affects:

- The `/rest/binary-data` endpoint - n8n.cloud instances (confirmed HTTP/2 524 timeout responses)

Attackers can exploit this by sending GET requests with empty filesystem URIs (`filesystem://` or `filesystem-v2://`) to the `/rest/binary-data` endpoint, causing resource exhaustion and service disruption.

### Patches

The issue has been patched in [1.99.0](https://github.com/n8n-io/n8n/releases/tag/n8n%401.99.0). All users should upgrade to this version or later.

The fix introduces strict checking of URI patterns.

Patch commit: https://github.com/n8n-io/n8n/pull/16229