CVE-2026-50132

Budibase is an open-source low-code platform. Prior to 3.39.0, `GET /api/chat-links/:instance/:token/handoff` is a public endpoint (no auth required) that performs a permanent, state-changing operation: it binds an external chat identity (Slack/Discord/MS Teams) to an authenticated Budibase user account, with no consent UI and no CSRF protection. The session token in the URL is created by the attacker (from their own /link slash command) and embeds the attacker's externalUserId. When an authenticated Budibase victim visits the URL, their account is silently and permanently linked to the attacker's Slack/Discord identity. The server responds with "Authentication succeeded." — no indication of what was linked. This vulnerability is fixed in 3.39.0.

CVSS v3 7.3 HIGH

7.3^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.1 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/Budibase/budibase/security/advisories/GHSA-v7j5-vc4m-723w	Exploit Mitigation Vendor Advisory
https://github.com/Budibase/budibase/security/advisories/GHSA-v7j5-vc4m-723w	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:budibase:budibase:*:*:*:*:*:*:*:*

History

30 Jun 2026, 19:26

Type	Values Removed	Values Added
References	~~() https://github.com/Budibase/budibase/security/advisories/GHSA-v7j5-vc4m-723w -~~	() https://github.com/Budibase/budibase/security/advisories/GHSA-v7j5-vc4m-723w - Exploit, Mitigation, Vendor Advisory
CPE		cpe:2.3:a:budibase:budibase::::::::
First Time		Budibase budibase Budibase

29 Jun 2026, 16:16

Type	Values Removed	Values Added
References	~~() https://github.com/Budibase/budibase/security/advisories/GHSA-v7j5-vc4m-723w -~~	() https://github.com/Budibase/budibase/security/advisories/GHSA-v7j5-vc4m-723w -

26 Jun 2026, 21:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-26 21:16

Updated : 2026-06-30 19:26

NVD link : CVE-2026-50132

Mitre link : CVE-2026-50132

CVE.ORG link : CVE-2026-50132

JSON object : View

Products Affected

budibase

budibase

CWE

CWE-284

Improper Access Control

CWE-352

Cross-Site Request Forgery (CSRF)

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