CVE-2026-54351 Budibase: Mass Assignment in Webhook Trigger Allows Cross-Workspace Automation Execution via appId Override
Attackers can override appId in webhook triggers to execute automations in victim workspaces, gaining unauthorized database access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-54351?
CVE-2026-54351 is a high-severity vulnerability in budibase, published on 26 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-915
Which versions are affected by CVE-2026-54351?
2 open source packages ship an affected version, including @budibase/server. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
@budibase/server npm | All versions | 3.39.9 |
@budibase/server npm | All versions | 3.39.9 |
Products include Budibase Budibase.
How do I fix CVE-2026-54351?
Upgrade @budibase/server to 3.39.9 or later.
Is CVE-2026-54351 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54351 exists.
Other vulnerabilities in budibase
- CVE-2026-54350 Budibase: Anonymous NoSQL operator injection via published-app query templates
- CVE-2026-27702 Budibase Vulnerable to Remote Code Execution via Unsafe eval() in View Filter Map Function (Budibase Cloud)
- CVE-2026-54352 Budibase: Arbitrary file read by workspace-builder via PWA-zip symlink upload
- CVE-2026-31818 Budibase: Server-Side Request Forgery via REST Connector with Empty Default Blacklist
- CVE-2026-30240 Budibase PWA ZIP Upload Path Traversal Allows Reading Arbitrary Server Files Including All Environment Secrets
Sources
Also known as GHSA-rgvg-3wpc-h44p.