CVE-2026-100681

Medium

Description

Budibase before 3.45.0 contains an unauthenticated server-side request forgery and credential exfiltration vulnerability in the Microsoft Teams webhook endpoint that accepts forged Bot Framework activities with arbitrary serviceUrl values. Attackers can submit a crafted POST request to inject an attacker-controlled serviceUrl that is persisted and used for all subsequent bot replies, causing the server to send live Microsoft OAuth access tokens in Authorization headers to the attacker's host and enabling blind internal network access.

SeverityMedium

CVSS5.4

Exploit probability23. percentile0.3%

ProductBudibase Server

PublishedSep 26, 2026

First seenSep 26, 2026

Weakness typeCWE-918Server-side request forgery (SSRF)

How to fix

Update

budibase server3.45.0 or later

Vendor advisories

github.com/Budibase/budibase/security/advisories/GHSA-942w-fccr-8r3c

Affected products

Product	Affected versions	Fixed in
budibase server	v < 3.45.0	3.45.0

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