What is CVE-2026-48149?

CVE-2026-48149 is a high-severity vulnerability in Budibase, classified under Cross-site Scripting. CVSS score: 8.1/10. Published 2026-05-27.

How severe is CVE-2026-48149?

High severity. CVSS v3 base score is 8.1 out of 10.

XSS in Budibase

CVE-2026-48149

Budibase is an open-source low-code platform. Prior to 3.39.0, the Budibase Text component renders markdown by assigning marked.parse(markdown) straight to innerHTML with no sanitizer (packages/bbui/src/Markdown/MarkdownViewer.svelte:22)…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (11.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

Affected products

Budibase — versions < 3.39.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-48149?: CVE-2026-48149 is a high-severity vulnerability in Budibase, classified under Cross-site Scripting. CVSS score: 8.1/10. Published 2026-05-27.
How severe is CVE-2026-48149?: High severity. CVSS v3 base score is 8.1 out of 10.