CSRF in Budibase Server
CVE-2026-72849
Budibase before 3.40.0 contains a cross-site request forgery vulnerability in the chat-link handoff endpoint that allows attackers to bind an external chat identity to a victim's account. Attackers can craft a phishing page that auto-submits a POST request with a leaked confirmation token to bind their chat identity to a victim user's account, enabling impersonation within agent operations and inheritance of victim permissions.
Vulnerability class: CSRF (Cross-Site Request Forgery)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (4.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 5th percentile — 4.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000
Affected products
- Budibase Server — versions 0, 3.40.0
Weakness classification (CWE)
References
- github.com/Budibase/budibase/security/advisories/GHSA-pvcr-8mvp-w8qr (vendor-advisory)
- www.vulncheck.com/advisories/budibase-before-identity-confusion-via-chat-link-h… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-72849?
- CVE-2026-72849 is a high-severity vulnerability in Budibase Server, classified under Cross-Site Request Forgery (CSRF). CVSS score: 7.7/10. Published 2026-08-13.
- How severe is CVE-2026-72849?
- High severity. CVSS v3 base score is 7.7 out of 10.