Vulnerability · Published Aug 13, 2026 · Assigned by GitHub_M

CVE-2026-73305Budibase: Privilege escalation via public role assignment API missing app-level authorization

High 8.8

In plain English

A high-severity privilege mismanagement in budibase from Budibase. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 45% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.5%top 55.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@budibase/server	no fix listed	GHSA-j9fc-w3mr-x6mv

Affected products (as reported)

Vendor	Product	Versions
Budibase	budibase	< 3.39.24

Weakness: CWE-269, CWE-862, CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/Budibase/budibase/security/advisories/GHSA-j9fc-w3mr-x6mv x_refsource_CONFIRM
https://github.com/Budibase/budibase/pull/19098 x_refsource_MISC
https://github.com/Budibase/budibase/commit/453391d3245dd04cc386ccd6959d38ccf30db9a8 x_refsource_MISC
https://github.com/Budibase/budibase/releases/tag/3.39.24 x_refsource_MISC