CVE-2026-82240: Budibase before 3.41.3 Privilege Escalation via User Update API

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-28 · updated 2026-10-08
Weakness: CWE-862

Description

Budibase before 3.41.3 fails to validate app-scoped builder role assignments in the public user create and update endpoints, allowing an authenticated app-scoped builder to grant builder access to unrelated apps. Attackers can submit crafted requests to the user update API with builder.apps fields to escalate privileges and gain unauthorized builder access to other applications in the same tenant.

Affected products

budibase server: before 3.41.3 — fixed in 3.41.3

How to fix

Upgrade to a fixed version: budibase server 3.41.3. Check the vendor advisory for mitigations.

References

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