CVE-2026-100681

Budibase before 3.45.0 SSRF and OAuth Token Exfiltration via Teams Webhook

Published: Sep 26, 2026Updated: Sep 26, 2026 Sources: CVE List NVDCWE-918

5.4MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:HAttack Complexity

High

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:CScope

Changed

Impact

C:LConfidentiality

Low

I:LIntegrity

Low

A:NAvailability

None

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Weaknesses

CWE-918

Affected Products

budibase

commercialaka budibase/budibase

serverMixed

Cloud & SaaS / saas-application

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Command and Control

Initial Access

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References

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

github.com

https://www.vulncheck.com/advisories/budibase-before-3.45.0-ssrf-and-oauth-token-exfiltration-via-teams-webhook

vulncheck.com

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