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CVE-2026-82241— Budibase backend-core SSRF via incomplete default blacklist

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.

Budibase 后端核心模块（@budibase/backend-core，被 @budibase/server 使用）在其用于 REST 数据源查询预览的默认 SSRF 黑名单（DEFAULT_BLACKLIST）中，遗漏了共享地址空间范围 100.64.0.0/10。当默认黑名单处于激活状态（即自托管部署未自定义 BLACKLIST_IPS）时，拥有“Builder”权限的已认证用户可以提交指向 100.64.0.0/10 网段内可达 HTTP(S) 服务的 REST 数据源查询预览请求，向 接口发起请求，导

CVSS 7.1 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-82241

Vulnerability Information
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Vulnerability Title
Budibase backend-core SSRF via incomplete default blacklist
Source: CVE Program / CVE List V5
Vulnerability Description
Budibase backend-core (@budibase/backend-core, as used by @budibase/server) omits the shared address space range 100.64.0.0/10 from its default SSRF blacklist (DEFAULT_BLACKLIST) used by REST datasource query previews. When the default blacklist is active (i.e., a self-hosted deployment has not defined BLACKLIST_IPS), an authenticated user with the Builder permission can submit a REST datasource query preview request to POST /api/queries/preview targeting a reachable HTTP(S) service in the 100.64.0.0/10 range, causing the server to send a request to that target and return its response through the preview flow. Per the advisory, no released fix was identified at the time of publication; remediation is to add 100.64.0.0/10 to DEFAULT_BLACKLIST.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/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 ~ 3.41.3 -

II. Public POCs for CVE-2026-82241

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III. Intelligence Information for CVE-2026-82241

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Vendor Advisories for CVE-2026-82241 (2)

Same Patch Batch · budibase · 2026-08-28 · 8 CVEs total

CVE-2026-82244 9.1 CRITICAL Budibase before 3.41.3 Remote Code Execution via Plugin eval()
CVE-2026-82240 8.1 HIGH Budibase before 3.41.3 Privilege Escalation via User Update API
CVE-2026-82245 8.1 HIGH Budibase before 3.41.3 Missing Authorization License Management
CVE-2026-82239 8.1 HIGH Budibase before 3.41.3 Authorization Bypass via datasources/query
CVE-2026-82242 7.7 HIGH Budibase before 3.41.3 Cross-Application Resource Injection via Missing Authorization
CVE-2026-82243 7.6 HIGH Budibase Server before 3.41.3 SSRF with Credential Leakage
CVE-2026-82246 7.1 HIGH Budibase Server before 3.41.3 SSRF via Query Import

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-82241

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