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CVE-2026-100681— Budibase before 3.45.0 SSRF and OAuth Token Exfiltration via Teams Webhook

Quick assessment

Affected
budibase server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Budibase 3.45.0 版本之前，其 Microsoft Teams webhook 端点存在未授权的服务器端请求伪造（SSRF）和凭据泄露漏洞。该端点接受带有任意 serviceUrl 值的伪造 Bot Framework 活动。攻击者可以提交精心构造的 POST 请求，注入由攻击者控制的 serviceUrl，该值将被持久化存储，并用于所有后续的机器人回复。这会导致服务器将实时的 Microsoft OAuth 访问令牌放置在 Authorization 请求头中，发送至攻击者控制的宿主，从而实现盲

CVSS 5.4 · Medium EPSS 0.25% · P15
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I. Basic Information for CVE-2026-100681

Vulnerability Information
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Vulnerability Title
Budibase before 3.45.0 SSRF and OAuth Token Exfiltration via Teams Webhook
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
budibase server 0 ~ 3.45.0 -

II. Public POCs for CVE-2026-100681

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III. Intelligence Information for CVE-2026-100681

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Vendor Advisories for CVE-2026-100681 (1)

Other References for CVE-2026-100681 (1)

Same Patch Batch · budibase · 2026-09-26 · 9 CVEs total

CVE-2026-100682 8.8 HIGH Budibase Server before 3.45.0 Arbitrary File Write via ZIP Symlink
CVE-2026-100686 8.1 HIGH Budibase before 3.45.0 Cross-Workspace Privilege Escalation via POST /api/global/groups/:g
CVE-2026-100684 8.1 HIGH Budibase Server 3.41.0 before 3.45.0 Authentication Bypass via OIDC
CVE-2026-100680 8.1 HIGH Budibase before 3.45.0 Arbitrary Local File Read via OpenAPI Import
CVE-2026-100683 8.0 HIGH Budibase before 3.45.0 SQL Injection via column-rename DDL
CVE-2026-100685 7.7 HIGH Budibase before 3.45.0 Information Disclosure via Chat Links
CVE-2026-100688 6.5 MEDIUM Budibase server before 3.45.0 Cross-Tenant Information Disclosure
CVE-2026-100687 5.5 MEDIUM Budibase Server before 3.45.0 Credential Exposure via External Table Broadcast

IV. Related Vulnerabilities

Same product: server
Same vendor: budibase
Same weakness: CWE-918

V. Comments for CVE-2026-100681

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