PT-2025-27798 · N8N · N8N

Agustedone + 3 · Published 2025-07-03 · Updated 2025-07-03 · CVE-2025-49595

Positive Technologies (AI Summary)

CVSS v3.1

4.9

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions: n8n versions prior to 1.99.0

Description: The issue is a Denial of Service vulnerability in the "/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, affecting the /rest/binary-data endpoint and n8n.cloud instances. Attackers can exploit this by sending GET requests with empty filesystem URIs to the /rest/binary-data endpoint, causing resource exhaustion and service disruption.

Recommendations: For versions prior to 1.99.0, upgrade to version 1.99.0 or later, which introduces strict checking of URI patterns to fix the issue. As a temporary workaround, consider restricting access to the /rest/binary-data endpoint to minimize the risk of exploitation. Avoid using empty filesystem URIs (filesystem:// or filesystem-v2://) in the affected endpoint until the issue is resolved.

Exploit

Fix

DoS

Resource Exhaustion

Weakness Enumeration

CWE-400

Related Identifiers

CVE-2025-49595

GHSA-PR9R-GXGP-9RM8

Affected Products

N8N

References · 10

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/49xxx/CVE-2025-49595.json · Exploit
• https://github.com/n8n-io/n8n/security/advisories/GHSA-pr9r-gxgp-9rm8 · Patch
• https://github.com/n8n-io/n8n/commit/43c52a8b4f844e91b02e3cc9df92826a2d7b6052 · Patch
• https://github.com/n8n-io/n8n/pull/16229 · Patch
• https://osv.dev/vulnerability/CVE-2025-49595 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-pr9r-gxgp-9rm8 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-49595 · Security Note
• https://github.com/n8n-io/n8n · Note
• https://twitter.com/CVEnew/status/1940750059286524121 · Twitter Post
• https://twitter.com/VulmonFeeds/status/1940832085238751502 · Twitter Post