Unauthenticated Server-Side Request Forgery in Budibase Affects Microsoft Teams Integration
CVE-2026-100681

6.3MEDIUM

Key Information:

Vendor

Budibase

Status
Server
Vendor
CVE Published:
26 September 2026

What is CVE-2026-100681?

Budibase versions before 3.45.0 are vulnerable to an unauthenticated server-side request forgery (SSRF) and credential exfiltration. This vulnerability affects the Microsoft Teams webhook endpoint, which is susceptible to accepting maliciously constructed Bot Framework activities with arbitrary serviceUrl values. By sending a specially crafted POST request, attackers can introduce a compromised serviceUrl, which is then stored and utilized in future bot interactions. This results in the unauthorized transmission of live Microsoft OAuth access tokens within Authorization headers to an attacker-controlled endpoint, thereby granting unrestricted access to internal network resources.

Affected Version(s)

server 0 < 3.45.0

server 3.45.0

References

https://github.com/Budibase/budibase/security/advisories/...
vendor-advisory
https://www.vulncheck.com/advisories/budibase-before-3.45...
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

csidhant
.