CVE-2026-58661 json
n8n - Disk Space Exhaustion via Data-Table File Upload Endpoint
published 2026-07-10 4 mo ago modified 2026-10-29 10 d ago also GHSA-w867-jm58-p9pv , EUVD-2026-42893
- cvss
- 4.3
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 32%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- npm n8n 1.123.58, 2.28.0
- n8n n8n 1.123.58, 2.28.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | n8n | >=2.0.0, <2.28.0 <1.123.58 |
2.28.0 1.123.58 |
Affected products
- n8n n8n
Classification
- Weakness
-
- CWE-770 Allocation of Resources Without Limits or Throttling
References
-
github.com
/n8n-io/n8n/security/advisories/GHSA-w867-jm58-p9pv
vendor-advisory, web, mitigation
-
vulncheck.com
/advisories/n8n-disk-space-exhaustion-via-data-table-file-upload-endpoint
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-58661
advisory
-
github.com
/n8n-io/n8n
package
-
github.com
/n8n-io/n8n/releases/tag/n8n@1.123.58
web
-
github.com
/n8n-io/n8n/releases/tag/n8n@2.28.0
web
Sources
- CVE List CVE-2026-58661
- GitHub Advisory GHSA-w867-jm58-p9pv
- NVD CVE-2026-58661
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