CVE-2026-58661
n8n - Disk Space Exhaustion via Data-Table File Upload Endpoint
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.
INFO
Published Date :
July 10, 2026, 3:16 p.m.
Last Modified :
July 13, 2026, 4:57 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update n8n to version 1.123.58 or later.
- Apply security patches for affected n8n versions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-58661.
| URL | Resource |
|---|---|
| https://github.com/n8n-io/n8n/security/advisories/GHSA-w867-jm58-p9pv | Mitigation Vendor Advisory |
| https://www.vulncheck.com/advisories/n8n-disk-space-exhaustion-via-data-table-file-upload-endpoint | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-58661 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-58661
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-58661 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-58661 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 13, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L Added CPE Configuration OR *cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:* versions up to (excluding) 1.123.58 *cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:* versions from (including) 2.0.0 up to (excluding) 2.28.0 *cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:* versions up to (excluding) 1.123.58 *cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:* versions from (including) 2.0.0 up to (excluding) 2.28.0 Added Reference Type VulnCheck: https://github.com/n8n-io/n8n/security/advisories/GHSA-w867-jm58-p9pv Types: Mitigation, Vendor Advisory Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/n8n-disk-space-exhaustion-via-data-table-file-upload-endpoint Types: Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 10, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-58661', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-10T16:43:17.458913Z'} -
New CVE Received by [email protected]
Jul. 10, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'n8n', 'product': 'n8n', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '2.28.0', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '2.28.0', 'versionType': 'semver'}], 'packageURL': 'pkg:npm/n8n', 'defaultStatus': 'unaffected'}, {'vendor': 'n8n', 'product': 'n8n', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '1.123.58', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '1.123.58', 'versionType': 'semver'}], 'packageURL': 'pkg:npm/n8n', 'defaultStatus': 'unaffected'}] Added 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. Added CVSS V4.0 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 Added CWE CWE-770 Added Reference https://github.com/n8n-io/n8n/security/advisories/GHSA-w867-jm58-p9pv Added Reference https://www.vulncheck.com/advisories/n8n-disk-space-exhaustion-via-data-table-file-upload-endpoint