CVE-2026-58661— n8n - Disk Space Exhaustion via Data-Table File Upload Endpoint
Quick assessment
Affected
n8n n8n
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
n8n是n8n公司开源的一个可扩展的工作流自动化工具。 n8n 2.28.0之前版本和1.123.58之前版本存在资源管理错误漏洞，该漏洞源于data-table文件上传端点中每个请求的配额检查未考虑已写入共享临时目录的文件，可能导致经过身份验证的用户重复上传文件，直到定期清理运行前在磁盘上累积，从而耗尽主机上的可用磁盘空间。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-58661
Vulnerability Information
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Vulnerability Title
n8n - Disk Space Exhaustion via Data-Table File Upload Endpoint
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
n8n 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
n8n是n8n公司开源的一个可扩展的工作流自动化工具。 n8n 2.28.0之前版本和1.123.58之前版本存在资源管理错误漏洞，该漏洞源于data-table文件上传端点中每个请求的配额检查未考虑已写入共享临时目录的文件，可能导致经过身份验证的用户重复上传文件，直到定期清理运行前在磁盘上累积，从而耗尽主机上的可用磁盘空间。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-58661
| # | POC Description | Source Link | Shenlong Link |
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Vendor Advisories for CVE-2026-58661 (2)
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V. Comments for CVE-2026-58661
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