Description

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.

Classification

CVE ID: CVE-2025-49595

CVSS Base Severity: MEDIUM

CVSS Base Score: 4.9

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Affected Products

Vendor: n8n-io

Product: n8n

References

https://nvd.nist.gov/vuln/detail/CVE-2025-49595
https://github.com/n8n-io/n8n/security/advisories/GHSA-pr9r-gxgp-9rm8
https://github.com/n8n-io/n8n/pull/16229
https://github.com/n8n-io/n8n/commit/43c52a8b4f844e91b02e3cc9df92826a2d7b6052

Timeline