What is CVE-2026-46426?

CVE-2026-46426 is a high-severity vulnerability in Budibase, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2026-05-27.

How severe is CVE-2026-46426?

High severity. CVSS v3 base score is 7.6 out of 10.

XSS in Budibase

CVE-2026-46426

Budibase is an open-source low-code platform. Prior to 3.38.2, the file upload endpoint POST /api/attachments/process does not enforce active-content restrictions for authenticated users. The checks for dangerous file extensions are condit…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (10.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/A:N.

Affected products

Budibase — versions < 3.38.2

Weakness classification (CWE)

CWE-79 — Cross-site Scripting
CWE-434 — Unrestricted Upload of File with Dangerous Type

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-46426?: CVE-2026-46426 is a high-severity vulnerability in Budibase, classified under Cross-site Scripting. CVSS score: 7.6/10. Published 2026-05-27.
How severe is CVE-2026-46426?: High severity. CVSS v3 base score is 7.6 out of 10.