SSRF (Server-Side Request Forgery) in @budibase/server (CVE-2026-73307)
Summary
SSRF in @budibase/server (CVE-2026-73307). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
Budibase: SSRF via bare fetch() in uploadUrl during AI table generation
Summary
The uploadUrl() function in packages/server/src/utilities/fileUtils.ts uses a bare fetch(url) call without any SSRF protection. This function is invoked when the AI table generation feature processes LLM-generated attachment column values that are strings (URLs).
A builder-level user can craft prompts that cause the LLM to generate internal IP addresses or cloud metadata endpoints as attachment URLs. When generateRows() calls processAttachments(), these URLs are fetched server-side without blacklist validation, allowing the attacker to reach internal services, cloud metadata APIs (169.254.169.254), or other network-internal resources.
This is a variant of the same class of issue addressed in other Budibase code paths where fetchWithBlacklist() is correctly used to prevent SSRF.
Affected Versions
<= 3.39.0 (current lerna.json version at time of analysis)
Vulnerability Details
Root Cause: uploadUrl() uses bare fetch() without SSRF blacklist check
// packages/server/src/utilities/fileUtils.ts:21-23
export async function uploadUrl(url: string): Promise {
try {
const res = await fetch(url) // No blacklist validation
This is called from:
// packages/server/src/sdk/workspace/ai/helpers/rows.ts:104-114
async function processAttachments(
entry: Record,
attachmentColumns: FieldSchema[]
) {
function processAttachment(value:…
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-73307 has been found in @budibase/server.
Risk of unauthorized operations or information disclosure.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "@budibase/server CVE-2026-73307" on the vendor's site.
CVE-2026-73307 (@budibase/server) — CWE-918
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
SSRF (CWE-918) exists in @budibase/server.
Check the vendor advisory for the affected versions of @budibase/server.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r '@budibase/server' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r '@budibase/server' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
@budibase/serverを grep し、稼働しているサービス・バージョンを把握する。 -
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- package github.com
- web github.com
- web github.com
- web github.com
- web github.com
- web github.com
- web security-advisories@github.com