CVE-2026-53929 Details
Description
NocoDB is software for building databases as spreadsheets. Prior to 2026.05.1, with NC_SECURE_ATTACHMENTS=true, an authenticated uploader could deliver .html or .svg attachments that the browser rendered inline from the NocoDB origin instead of forcing a download. The signed attachment handler stored response-header overrides under PascalCase keys (ResponseContentDisposition, ResponseContentType) while the controller that served the file read them under lowercase-hyphen names (response-content-disposition). The mismatch dropped the Content-Disposition: attachment header, leaving Express to auto-render .html, .svg, and similar inline. This vulnerability is fixed in 2026.05.1.
A stored cross-site scripting vulnerability has been identified in NocoDB versions prior to 2026.05.1. When the 'NC_SECURE_ATTACHMENTS' feature is enabled, an authenticated uploader could upload '.html' or '.svg' files that were rendered inline by the browser, instead of being downloaded. This issue arose because the signed attachment handler saved response-header overrides under PascalCase, while the file-serving controller read them as lowercase-hyphen names. This mismatch caused the 'Content-Disposition: attachment' header to be omitted, allowing Express to automatically render '.html', '.svg', and similar files inline. The vulnerability could be exploited to execute scripts in the context of the victim's browser, potentially accessing the authentication JWT from localStorage.
Users can upgrade to NocoDB version 2026.05.1 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 23, 2026CISA-ADP
Assessed Jun 25, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/nocodb/nocodb/security/advisories/GHSA-6mhr-74x2-98v9 | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| NocoDB | <= 2026.05.0 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 25, 2026 | CVE Modified | CISA-ADP |
| Jun 23, 2026 | New CVE Received | [email protected] |