Resource exhaustion in N8n
CVE-2025-49595
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (35.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- N8n
- N8n-Io N8n — versions < 1.99.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/n8n-io/n8n/security/advisories/GHSA-pr9r-gxgp-9rm8 (Patch, Third Party Advisory)
- github.com/n8n-io/n8n/pull/16229 (Patch)
- github.com/n8n-io/n8n/commit/43c52a8b4f844e91b02e3cc9df92826a2d7b6052 (Patch)
Frequently asked questions
- What is CVE-2025-49595?
- CVE-2025-49595 is a medium-severity vulnerability in N8n, classified under Uncontrolled Resource Consumption. CVSS score: 4.9/10. Published 2025-07-03.
- How severe is CVE-2025-49595?
- Medium severity. CVSS v3 base score is 4.9 out of 10.
- Is CVE-2025-49595 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.