CVE-2026-54351

8.2 HIGH 0.5% exploit odds Fix listed Other Web app

What it is

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.

At a glance

Exploitability: Can be exploited over the network with a low-privilege account. High risk of data exposure, data tampering.
Exploit odds: 0.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-06-26 21:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-30 19:52 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.5% in the next 30 days (EPSS).
Severity: 8.2 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2026-06-26 21:16 UTC
Last modified: 2026-06-30 19:52 UTC
Exploit probability: 0.5% · EPSS, next 30 days
Weakness: CWE-915
Record status: Analyzed

Affected

Budibase < 3.39.9

Attack profile CVSS 3.1 · 8.2

Attack vector: Network
Complexity: High
Privileges needed: Low
User interaction: None
Scope: Changed
Confidentiality: High
Integrity: High
Availability: None

Raw vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record