CVE-2026-58661: n8n

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• n8n n8n: before 1.123.58 (fixed in 1.123.58); from 2.0.0, before 2.28.0 (fixed in 2.28.0)

Published 2026-07-10. Last modified 2026-07-13.