Resource exhaustion in N8n
CVE-2026-58661
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.004 (30.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 30.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- N8n — versions 0, 2.28.0, 1.123.58
Weakness classification (CWE)
References
- github.com/n8n-io/n8n/security/advisories/GHSA-w867-jm58-p9pv (vendor-advisory, Mitigation, Vendor Advisory)
- www.vulncheck.com/advisories/n8n-disk-space-exhaustion-via-data-table-file-uplo… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-58661?
- CVE-2026-58661 is a medium-severity vulnerability in N8n, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2026-07-10.
- How severe is CVE-2026-58661?
- Medium severity. CVSS v3 base score is 4.3 out of 10.