CVE-2026-53927 nocodb CVE debrief

Who should care

Defenders of systems using NocoDB should be aware of this vulnerability. Specifically, those who have not updated to version 2026.05.1 or later are at risk. This vulnerability could potentially allow attackers to access sensitive cloud metadata.

Technical summary

The spreadsheet-fetch endpoint in NocoDB did not properly validate URLs, allowing for crafted URLs to bypass security restrictions. The regex blocklist used to filter URLs did not account for all possible IP address ranges, specifically allowing access to 127.0.0.0/8 and 169.254.0.0/16. This oversight enabled attackers to reach the cloud-metadata endpoint using a specially crafted URL. The vulnerability was addressed in NocoDB version 2026.05.1.

Defensive priority

Defenders should prioritize updating NocoDB to version 2026.05.1 or later. Additionally, they should monitor for any suspicious activity related to the spreadsheet-fetch endpoint and ensure that all URLs being processed are properly validated.

Recommended defensive actions

• Update NocoDB to version 2026.05.1 or later.
• Monitor the spreadsheet-fetch endpoint for suspicious activity.
• Ensure proper URL validation for all requests processed by NocoDB.
• Review and update security configurations to prevent similar vulnerabilities.
• Conduct regular security audits to identify potential issues.

Evidence notes

The CVE-2026-53927 record was obtained from the National Vulnerability Database (NVD). The vulnerability details were provided by the NVD and a GitHub security advisory. The information indicates that the vulnerability was fixed in NocoDB version 2026.05.1.

Official resources