CVE-2026-58661

Medium

Description

n8n before 2.28.0 (and before 1.123.58 on the 1.x branch) contains a disk space exhaustion vulnerability in the data-table file upload endpoint. The per-request quota check does not account for files already written to the shared temporary directory, allowing an authenticated user to repeatedly upload files that accumulate on disk until the periodic cleanup runs, potentially exhausting available disk space on the host.

SeverityMedium

CVSS4.3

Exploit probability—

Product

N8n

PublishedJul 10, 2026

First seenJul 10, 2026

Weakness typeCWE-770Allocation of resources without limits

How to fix

Update

n8n n8n1.123.58, 2.28.0 or later
n8n2.28.0, 1.123.58 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-w867-jm58-p9pv

Affected products

Product	Affected versions	Fixed in
n8n n8n	v < 1.123.58, 2.0.0 ≤ v < 2.28.0	1.123.58, 2.28.0
n8nnpm	2.0.0 ≤ v < 2.28.0, v < 1.123.58	2.28.0, 1.123.58

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