🛡️ CVE-2026-53929 — nocodb

⚪ Unknown ✅ No Known Exploit CWE-79 NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

NocoDB: Stored Cross-Site Scripting via Secure Attachment

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).

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs low-level privileges on the target. A user must be tricked into taking some action. Rated impact: confidentiality none, integrity none, availability none.

Weakness class

CVE-2026-53929 is classified as CWE-79: Cross-site Scripting (XSS). User-supplied data is written into a page without escaping, so attacker script runs in the browser of anyone who views it.

Affected software

CVE-2026-53929 is recorded against 2 packages.

  • nocodb
  • unknown

Timeline and source

Published on 17 June 2026 and last revised on 20 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector 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
CWE CWE-79
Public Exploit ✅ No
Source NVD
Published 2026-06-17
Updated 2026-08-12
Modified 2026-07-20
Fix URL N/A

Affected Packages

Software From version Fixed in
nocodb — —
unknown — —

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