CVE-2026-126293
Received Received - Intake

NocoDB Attachment Size Limit Bypass via URL Upload

Publication date: 2026-11-13

Last updated on: 2026-11-13

Assigner: VulnCheck

Description
NocoDB before 2026.06.2 contains an attachment size limit bypass that allows authenticated Editor users to store oversized files because data-attachment-v3.service.ts trusts the remote server's advertised content length. Attackers can point the v3 upload-by-URL endpoint at a server that understates or omits its length to exhaust disk space or storage quota.

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Meta Information

Published
2026-11-13
Last Modified
2026-11-13
Generated
2026-11-13
AI Q&A
2026-11-13
EPSS Evaluated
N/A
NVD
CVE-2026-126293
EUVD
EUVD-2026-125228

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
nocodb nocodb to 2026.06.2 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-770 The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

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Executive Summary

NocoDB before version 2026.06.2 has a flaw in its upload-by-URL feature where authenticated Editor users can bypass file size limits. The system trusts the remote server's reported file size instead of verifying the actual data received. Attackers can exploit this by pointing the upload endpoint to a server that understates or omits the file size, allowing them to store oversized files and potentially exhaust disk space or storage quotas.

Detection Guidance

Check NocoDB version with 'npm list nocodb' or 'docker inspect <container>'. Monitor disk space usage for unexpected growth. Inspect logs for upload-by-URL requests pointing to external servers. Look for files exceeding configured size limits in storage directories.

Impact Analysis

This vulnerability can lead to disk space exhaustion or storage quota breaches, disrupting normal system operations. Attackers with Editor privileges could fill up storage, causing performance degradation or system crashes. It may also enable denial-of-service conditions by consuming all available storage resources.

Mitigation Strategies

Upgrade NocoDB to version 2026.06.2 or later immediately. Disable the upload-by-URL feature if not required. Implement strict size validation for all uploads. Monitor storage quotas and set alerts for unusual disk usage patterns.

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