CVE-2026-48149— Budibase: Stored XSS in Text component: BASIC users execute JS in admin session via MarkdownViewer innerHTML + CDN+srcdoc CSP bypass
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-48149
Vulnerability Information
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Vulnerability Title
Budibase: Stored XSS in Text component: BASIC users execute JS in admin session via MarkdownViewer innerHTML + CDN+srcdoc CSP bypass
Source: NVD (National Vulnerability Database)
Vulnerability Description
Budibase is an open-source low-code platform. Prior to 3.39.0, the Budibase Text component renders markdown by assigning marked.parse(markdown) straight to innerHTML with no sanitizer (packages/bbui/src/Markdown/MarkdownViewer.svelte:22). Any column a builder binds to a Text component in Markdown mode is a stored-XSS sink writable by every BASIC app user with WRITE on the underlying table. This vulnerability is fixed in 3.39.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-48149
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Vendor Advisories for CVE-2026-48149 (1)
Same Patch Batch · Budibase · 2026-05-27 · 20 CVEs total
| CVE-2026-46425 | 9.9 CRITICAL | Budibase: SCIM endpoints lack role-based authorization, BASIC users CRUD tenant users |
| CVE-2026-48150 | 9.0 CRITICAL | Budibase: Workspace-scoped builder escalates to global admin via /api/public/v1/roles/assi |
| CVE-2026-45716 | 8.8 HIGH | Budibase: Builder-to-Admin Privilege Escalation via onboardUsers Endpoint Without SMTP Con |
| CVE-2026-45717 | 8.8 HIGH | Budibase: `PUT /api/datasources/:datasourceId` is protected only by `TABLE/READ` permissio |
| CVE-2026-48153 | 8.5 HIGH | Budibase: SSRF via OAuth2 token endpoint URL reaches internal hosts and cloud metadata |
| CVE-2026-48152 | 8.1 HIGH | Budibase: Basic app users can exfiltrate stored REST datasource auth by rewriting datasour |
| CVE-2026-46427 | 7.7 HIGH | Budibase: Snowflake private key returned unmasked from datasource API to BASIC users |
| CVE-2026-45061 | 7.7 HIGH | Budibase: SSRF via trivial `.tar.gz` substring bypass in Plugin URL upload (`/api/plugin`) |
| CVE-2026-48146 | 7.7 HIGH | Budibase: SSRF via OAuth2 Config Validation — Missing fetchWithBlacklist Protection |
| CVE-2026-45548 | 7.7 HIGH | Budibase: SSRF in AI Extract File Automation Step via Missing IP Blacklist Validation |
| CVE-2026-45715 | 7.7 HIGH | Budibase: SSRF Bypass via HTTP Redirect in REST Datasource Integration |
| CVE-2026-46426 | 7.6 HIGH | Budibase: Unrestricted Upload of File with Dangerous Type |
| CVE-2026-48151 | 7.5 HIGH | Budibase: Webhook schema endpoint authorization bypass allows unauthenticated mutation of |
| CVE-2026-48147 | 6.5 MEDIUM | Budibase: Unanchored Regex in `matchers.ts` Allows CSRF Bypass via Query String Injection |
| CVE-2026-45719 | 6.5 MEDIUM | Budibase: CouchDB Reduce Injection via Unsanitized Calculation Parameter in V1 Views API |
| CVE-2026-45718 | 5.4 MEDIUM | Budibase: Row Action Trigger Bypasses View Row Filter Security Boundary Allowing Action on |
| CVE-2026-46424 | 4.2 MEDIUM | Budibase: Missing Cache Invalidation on Public API Role Unassignment Allows Revoked Users |
| CVE-2026-48128 | Budibase: SSRF via User-Controlled queryId in Automation Execute Query Step | |
| CVE-2026-48148 | Budibase: Unvalidated VectorDB Host Parameter Enables SSRF |
IV. Related Vulnerabilities
Same product: budibase
- CVE-2026-48147
Budibase: Unanchored Regex in `matchers.ts` Allows CSRF Bypa - CVE-2026-48148
Budibase: Unvalidated VectorDB Host Parameter Enables SSRF - CVE-2026-45548
Budibase: SSRF in AI Extract File Automation Step via Missin - CVE-2026-45715
Budibase: SSRF Bypass via HTTP Redirect in REST Datasource I - CVE-2026-45716
Budibase: Builder-to-Admin Privilege Escalation via onboardU
Same vendor: Budibase
- CVE-2026-48147
Budibase: Unanchored Regex in `matchers.ts` Allows CSRF Bypa - CVE-2026-48148
Budibase: Unvalidated VectorDB Host Parameter Enables SSRF - CVE-2026-45548
Budibase: SSRF in AI Extract File Automation Step via Missin - CVE-2026-45715
Budibase: SSRF Bypass via HTTP Redirect in REST Datasource I - CVE-2026-45716
Budibase: Builder-to-Admin Privilege Escalation via onboardU
Same weakness: CWE-79
- CVE-2026-4334
Shariff Wrapper <= 4.6.20 - Authenticated (Contributor+) Cro - CVE-2024-47097
Reflected Cross-Site Scripting in Follet School Solutions De - CVE-2024-47096
Reflected Cross-Site Scripting in Follet School Solutions De - CVE-2026-7052
HT Contact Form <= 2.8.2 - Unauthenticated Stored Cross-Site - CVE-2026-7660
Easy Updates Manager <= 9.0.20 - Reflected Cross-Site Script
V. Comments for CVE-2026-48149
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