AI agent vulnerability · n8n

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

mediumCVSS 3.1 4.9GHSA-pr9r-gxgp-9rm8

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.

Published Jul 3, 2025

Affected packages

n8n

Ecosystem: npm
Affected: < 1.99.0
Fixed in: 1.99.0
Check: npm ls n8n

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

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. 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

Credited to pfelilpe, LucianoSorrentino95, agustedone, ivov, ffaggiani.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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