TI-2025-31608 Aliases CVE-2025-49595 GHSA-pr9r-gxgp-9rm8

n8n Vulnerable to Denial of Service via Malformed Binary Data Requests

LOW 23CWE-400Published 2025-07-03 · Updated 2025-07-03

Key facts

Attack vector: Network
Privileges required: High
User interaction: None
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-400.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00472 41st percentileScored 2026-11-07

Fix Fixed n8n (n8n-io): 1.99.0n8n (npm): 1.99.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
n8n	n8n	before 1.99.0	1.99.0	Patch available	CNA
—	n8n (npm)	before 1.99.0	1.99.0	Patch available	GHSA-pr9r-gxgp-9rm8

n8n Vendorn8n Affected before 1.99.0 Fixed in 1.99.0 Patch available CNA
n8n (npm) Vendor— Affected before 1.99.0 Fixed in 1.99.0 Patch available GHSA-pr9r-gxgp-9rm8

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:n8n:n8n::::::node.js::*	before 1.99.0	Vulnerable	n8n

cpe:2.3:a:n8n:n8n:*:*:*:*:*:node.js:*:* Versions before 1.99.0 Vulnerable ·n8n

Remediation

Fix · CNA n8n (n8n-io) Fixed in 1.99.0
Fix · GHSA-pr9r-gxgp-9rm8 n8n (npm) Fixed in 1.99.0 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2025-49595
2026-10-03 Alias added: GHSA-pr9r-gxgp-9rm8

References

Patch 3

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2025-49595

Other 1

https://github.com/n8n-io/n8n

TI-2025-42131 n8n Vulnerable to Remote Code Execution via Expression Injection KEVCVSS 3.1CRITICAL 10.0
TI-2026-17560 n8n Vulnerable to Unauthenticated File Access via Improper Webhook Request Handling CVSS 3.1CRITICAL 10.0
TI-2026-01167 Authenticated users can bypass the Expression sandbox mechanism to achieve full remote… CVSS 3.1CRITICAL 9.9
TI-2026-00644 Sandbox escape in n8n Python task runner allows for arbitrary code execution on the underlying host. CVSS 3.1CRITICAL 9.9
TI-2025-35293 An arbitrary file upload vulnerability in the Chat Trigger component of N8N v1.95.3… CVSS 3.1HIGH 8.8
TI-2023-12275 The n8n package 0.218.0 for Node.js allows Escalation of Privileges. CVSS 3.1HIGH 8.8

See all 178 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences