CVE-2026-53929: NocoDB Cross-Site Scripting Vulnerability

MODERATE
Advisory Identifier: GHSA-6mhr-74x2-98v9
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CWE-79
Published
Advisory Summary

CVE-2026-53929 is a MODERATE cross-site scripting vulnerability (CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')) affecting NocoDB libraries in the npm ecosystem. The issue involves stored cross-site scripting via secure attachment. Remediation is available in the latest vendor maintenance releases.

CVE-2026-53929 at a Glance

CVE Identifier CVE-2026-53929
GHSA Identifier GHSA-6mhr-74x2-98v9
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Product NocoDB
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-53929

To remediate this vulnerability, upgrade all affected NocoDB dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

nocodb fixed: Latest secure release 
npm install nocodb@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls nocodb

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-53929, inspect your project dependencies using npm:

npm ls nocodb

Analyze the terminal output to locate any version of NocoDB in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls nocodb command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting'), where the product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. In NocoDB, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary 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. ### Details 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. The fix corrects the key case and additionally forces `Content-Disposition: attachment` and `Content-Type: application/octet-stream` for any MIME type not on the preview allowlist. ### Impact Stored Cross-Site Scripting in the NocoDB origin from inline-rendered uploads. Script executing in the victim's browser can read the auth JWT from `localStorage`. Exploitation requires authenticated upload permission and the secure-attachment mode to be enabled. ### Credit This issue was reported by [@bugbunny-research](https://github.com/bugbunny-research). It was independently reported by [@DavidCarliez](https://github.com/DavidCarliez).

CVE-2026-53929 Affected NocoDB Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
nocodb
npm/nocodb
npm
≤ 0.301.3

References

GitHub Advisory / Wiki ADVISORY
https://github.com/nocodb/nocodb/security/advisories/GHSA-6mhr-74x2-98v9
NVD — CVE-2026-53929 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-53929
NocoDB Source Repository REPOSITORY
https://github.com/nocodb/nocodb

Frequently Asked Questions

What is CVE-2026-53929?
CVE-2026-53929 is a security vulnerability in NocoDB involving Stored Cross-Site Scripting via Secure Attachment under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting').
Which NocoDB versions are affected?
Affected versions include releases prior to current release patches across affected packages: nocodb.
What version fixes CVE-2026-53929?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is nocodb affected?
Yes, nocodb is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with CVE-2026-53929?
CVE-2026-53929 is classified under CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') (The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.).
How can I check npm dependencies for CVE-2026-53929?
Run the dependency tree command: 'npm ls nocodb'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-6mhr-74x2-98v9",
  "modified" : "2026-07-20T21:20:12Z",
  "published" : "2026-06-17T14:07:52Z",
  "aliases" : [ "CVE-2026-53929" ],
  "summary" : "NocoDB: Stored Cross-Site Scripting via Secure Attachment",
  "details" : "### Summary\nWith `NC_SECURE_ATTACHMENTS=true`, an authenticated uploader could deliver `.html` or\n`.svg` attachments that the browser rendered inline from the NocoDB origin instead of\nforcing a download.\n\n### Details\nThe signed attachment handler stored response-header overrides under PascalCase keys\n(`ResponseContentDisposition`, `ResponseContentType`) while the controller that served\nthe file read them under lowercase-hyphen names (`response-content-disposition`). The\nmismatch dropped the `Content-Disposition: attachment` header, leaving Express to\nauto-render `.html`, `.svg`, and similar inline. The fix corrects the key case and\nadditionally forces `Content-Disposition: attachment` and\n`Content-Type: application/octet-stream` for any MIME type not on the preview\nallowlist.\n\n### Impact\nStored Cross-Site Scripting in the NocoDB origin from inline-rendered uploads. Script\nexecuting in the victim's browser can read the auth JWT from `localStorage`.\nExploitation requires authenticated upload permission and the secure-attachment mode\nto be enabled.\n\n### Credit\nThis issue was reported by [@bugbunny-research](https://github.com/bugbunny-research).\nIt was independently reported by [@DavidCarliez](https://github.com/DavidCarliez).",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "nocodb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "0.301.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/nocodb/nocodb/security/advisories/GHSA-6mhr-74x2-98v9"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-53929"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/nocodb/nocodb"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-17T14:07:52Z",
    "nvd_published_at" : "2026-06-23T21:17:01Z"
  }
}