CVE-2025-49595
n8n Vulnerable to Denial of Service via Malformed Binary Data Requests
Impact
## 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
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | n8n | < 1.99.0 | 1.99.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| N8n | N8n | before 1.99.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/n8n-io/n8n/commit/43c52a8b4f844e91b02e3cc9df92826a2d7b6052
- https://github.com/n8n-io/n8n/pull/16229
- https://github.com/n8n-io/n8n/security/advisories/GHSA-pr9r-gxgp-9rm8
- https://github.com/advisories/GHSA-pr9r-gxgp-9rm8
- https://nvd.nist.gov/vuln/detail/CVE-2025-49595