CVE-2026-73305 Budibase: Privilege escalation via public role assignment API missing app-level authorization
An app-scoped builder can escalate privileges to access other applications' data and configurations due to missing authorization checks in the role assignment API.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-73305?
CVE-2026-73305 is a high-severity vulnerability in budibase, published on 13 Aug 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 3.39.24, POST /api/public/v1/roles/assign called validateGlobalRoleUpdate without checking appBuilder.appId or role.appId in packages/server/src/api/controllers/public/globalRoleValidation.ts. An app-scoped builder could scope the request to an app they control and then grant themselves builder access or an arbitrary role in another app, exposing that app data, datasource configuration, and automations. This issue is fixed in version 3.39.24.
Which versions are affected by CVE-2026-73305?
2 open source packages ship an affected version, including @budibase/server.
| Package | Affected | Fixed in |
|---|---|---|
@budibase/server npm | All versions to 3.38.1 | None |
@budibase/server npm | All versions to 3.38.1 | None |
How do I fix CVE-2026-73305?
No fix has been published for CVE-2026-73305 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-73305 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73305 exists.
Sources
Also known as GHSA-j9fc-w3mr-x6mv.