EUVD-2026-87654
GHSA-v4j8-r967-w6rg
Severity by source
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Unauthenticated network endpoint (PR:N/UI:N/AV:N) but forging valid activities raises AC:H; leaking tokens and reaching internal hosts crosses a trust boundary (S:C) with Low C/I and no availability impact.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
4DescriptionCVE.org
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.
AnalysisAI
Unauthenticated server-side request forgery in Budibase's Microsoft Teams webhook endpoint (all Budibase Server releases before 3.45.0) lets remote attackers submit a forged Bot Framework activity containing an arbitrary serviceUrl that the server persists and then reuses for every subsequent outbound bot reply. Those replies carry live Microsoft OAuth access tokens in their Authorization headers, so the server ultimately transmits credentials to the attacker's host and can also be steered into blind requests against internal network resources. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires the Budibase Microsoft Teams bot/webhook integration to be configured and its endpoint network-reachable; the attack targets that specific endpoint by submitting forged Bot Framework activities with an arbitrary serviceUrl. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a network-reachable, unauthenticated flaw (CVSS 4.0 vector PR:N/UI:N/AV:N) but tempered by high attack complexity (AC:H), reflecting the need to forge valid Bot Framework activity structures and win the persistence-then-reply flow. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade Budibase Server to 3.45.0 or later, which is the vendor-released fix for this issue. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
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External POC / Exploit Code
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