Cross-site scripting in NocoDB - CVE-2026-53929
Published: November 9, 2026
Vulnerability identifier: #VU162855
CSH Severity: Low
CVSS v4: 5.1 [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]
CVE-ID: CVE-2026-53929
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an authenticated attacker with upload permission to execute stored cross-site scripting in the NocoDB origin and read a victim's authentication JWT.
The vulnerability exists due to a response-header key mismatch that prevents download enforcement in NocoDB's signed attachment handler when NC_SECURE_ATTACHMENTS=true is enabled. An authenticated attacker with upload permission can upload malicious HTML or SVG attachments that execute scripts when a victim opens them in a browser.
Affected software
NocoDB
How to mitigate CVE-2026-53929
Install security update from vendor's website.
NocoDB - update to 2026.05.1