Vulnerability · Published Aug 12, 2026 · Assigned by GitHub_M

CVE-2026-73406Budibase: Unauthenticated user information disclosure via public tenant user lookup endpoint

High 7.5

In plain English

A high-severity information exposure 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 44% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.5%top 56.4% 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 3.39.32, GET /api/global/users/tenant/:id was listed in PUBLIC_ENDPOINTS in packages/worker/src/api/index.ts, and tenantUserLookup returned a full PlatformUser document. An unauthenticated caller could query an email or user identifier, distinguish existing users from missing users, and obtain tenant identifiers, user identifiers, email addresses, SSO identifiers, and document revision metadata. This issue is fixed in version 3.39.32.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@budibase/server	no fix listed	GHSA-hr66-5mqr-8mpx

Affected products (as reported)

Vendor	Product	Versions
Budibase	budibase	< 3.39.32

Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/Budibase/budibase/security/advisories/GHSA-hr66-5mqr-8mpx x_refsource_CONFIRM
https://github.com/Budibase/budibase/pull/19221 x_refsource_MISC
https://github.com/Budibase/budibase/commit/0bdf648ff4c024a138a546ef84217e4efbee538e x_refsource_MISC
https://github.com/Budibase/budibase/releases/tag/3.39.32 x_refsource_MISC