Vulnerability · Published Jul 3, 2025 · Assigned by GitHub_M

CVE-2025-49595n8n Vulnerable to Denial of Service via Malformed Binary Data Requests

Medium 4.9

In plain English

A medium-severity uncontrolled resource consumption in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.9Medium

Exploit odds (30 days)0.5%top 59.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	n8n	1.99.0	GHSA-pr9r-gxgp-9rm8

Affected products (as reported)

Vendor	Product	Versions
n8n-io	n8n	< 1.99.0

Weakness: CWE-400 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-pr9r-gxgp-9rm8 x_refsource_CONFIRM
https://github.com/n8n-io/n8n/pull/16229 x_refsource_MISC
https://github.com/n8n-io/n8n/commit/43c52a8b4f844e91b02e3cc9df92826a2d7b6052 x_refsource_MISC