XSS in Budibase
CVE-2026-35218
Budibase is an open-source low-code platform. Prior to version 3.32.5, Budibase's Builder Command Palette renders entity names (tables, views, queries, automations) using Svelte's {@html} directive without any sanitization. An authenticated user with Builder access can create a table, automation, view, or query whose name contains an HTML payload (e.g. <img src=x onerror=alert(document.domain)>). When any Builder-role user in the same workspace opens the Command Palette (Ctrl+K), the payload executes in their browser, stealing their session cookie and enabling full account takeover. This issue has been patched in version 3.32.5.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.004 (36.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 36.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Budibase — versions < 3.32.5
Weakness classification (CWE)
References
- github.com/Budibase/budibase/security/advisories/GHSA-gp5x-2v54-v2q5 (Exploit, Vendor Advisory)
- github.com/Budibase/budibase/pull/18243 (Patch, Issue Tracking)
- github.com/Budibase/budibase/commit/c9ccf0c19e5849f1bda96401aa33f97c99cd8cd6 (Patch)
- github.com/Budibase/budibase/releases/tag/3.32.5 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-35218?
- CVE-2026-35218 is a high-severity vulnerability in Budibase, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2026-04-03.
- How severe is CVE-2026-35218?
- High severity. CVSS v3 base score is 8.7 out of 10.