Authenticated disk exhaustion via cumulative temporary uploads
Published Jul 10, 2026 · Updated Jul 10, 2026
Resource exhaustion in n8n before 2.28.0 and before 1.123.58 on the 1.x branch allows remote authenticated users to exhaust host disk space. The data-table upload quota checks only the current request and omits files already stored in the shared temporary directory, so repeated uploads accumulate until cleanup. Access to the authenticated upload endpoint is required, and successful exploitation can interrupt the n8n service.
Summary
What happened
Resource exhaustion in n8n before 2.28.0 and before 1.123.58 on the 1.x branch allows remote authenticated users to exhaust host disk space. The data-table upload quota checks only the current request and omits files already stored in the shared temporary directory, so repeated uploads accumulate until cleanup. Access to the authenticated upload endpoint is required, and successful exploitation can interrupt the n8n service.
The record
- CVE
- CVE-2026-58661
- Published
- Jul 10, 2026
- Updated
- Jul 10, 2026
- Vendor
- n8n
- Product
- n8n
- Classifications
- CWE-770, T1499.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jul 10, 2026CVE publishedPublication date reported by the CVE source.
- Jul 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <1.123.58
- Affected versionversion=0 <2.28.0
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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