CVE-2026-54356— Budibase authenticated arbitrary S3 signed upload URL issuance via `/api/attachments/:datasourceId/url`
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I. Basic Information for CVE-2026-54356
Vulnerability Information
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Vulnerability Title
Budibase authenticated arbitrary S3 signed upload URL issuance via `/api/attachments/:datasourceId/url`
Source: CVE Program / CVE List V5
Vulnerability Description
Budibase is an open-source low-code platform. Prior to 3.41.3, POST /api/attachments/:datasourceId/url in packages/server/src/api/routes/static.ts and packages/server/src/api/controllers/static/index.ts allows an authenticated published-app user with the BASIC role to supply attacker-controlled bucket and key values and obtain signedUrl and publicUrl values backed by stored S3 datasource credentials. This issue is fixed in version 3.41.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-54356
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCVerified env Premium
Qwen3.6-35B-A3B · 10580 chars
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III. Intelligence Information for CVE-2026-54356
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Vendor Advisories for CVE-2026-54356 (1)
Vendor Pages for CVE-2026-54356 (1)
- 🔗 Release 3.41.3 · Budibase/budibase · GitHubx_refsource_MISC
Same Patch Batch · Budibase · 2026-08-17 · 4 CVEs total
| CVE-2026-73410 | 8.5 HIGH | Budibase: SSRF via DNS rebinding in the REST datasource integration |
| CVE-2026-64657 | 8.4 HIGH | Budibase: Database Connector SQL Injections in PostgreSQL, MS SQL, and MySQL |
| CVE-2026-35219 | 7.1 HIGH | Budibase: SSRF in Automation Steps - Webhook, Zapier, N8N, Slack, Discord Bypass IP Blackl |
IV. Related Vulnerabilities
Same product: budibase
- CVE-2026-35219
Budibase: SSRF in Automation Steps - Webhook, Zapier, N8N, S - CVE-2026-73410
Budibase: SSRF via DNS rebinding in the REST datasource inte - CVE-2026-64657
Budibase: Database Connector SQL Injections in PostgreSQL, M - CVE-2026-73305
Budibase: Privilege escalation via public role assignment AP - CVE-2026-73304
Budibase: SSO OAuth2 Token Leakage via User Metadata Endpoin
Same vendor: Budibase
- CVE-2026-35219
Budibase: SSRF in Automation Steps - Webhook, Zapier, N8N, S - CVE-2026-73410
Budibase: SSRF via DNS rebinding in the REST datasource inte - CVE-2026-64657
Budibase: Database Connector SQL Injections in PostgreSQL, M - CVE-2026-72859
Budibase 3.39.4 before 3.40.0 Authorization Regression via S - CVE-2026-73305
Budibase: Privilege escalation via public role assignment AP
Same weakness: CWE-862
- CVE-2026-11801
WPAdverts <= 2.3.2 - Missing Authorization to Unauthenticate - CVE-2026-69146
MLflow: LogInputs endpoint bypasses per-run UPDATE authoriza - CVE-2026-69148
MLflow: CreateModelVersion source validation does not check - CVE-2026-75108
Next Terminal Missing Per-Asset Authorization on Portal Endp - CVE-2026-75109
Determined Missing Authorization Check on Generic Task Endpo
V. Comments for CVE-2026-54356
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