Path Traversal in Budibase (CVE-2026-35214)
Summary
Path traversal in Budibase (CVE-2026-35214). Data can be tampered with by attackers. Exploitable via POST /api/plugin/upload.
Original description
The description as published by the source.
Budibase is an open-source low-code platform. Prior to version 3.33.4, the plugin file upload endpoint (POST /api/plugin/upload) passes the user-supplied filename directly to createTempFolder() without sanitizing path traversal sequences. An attacker with Global Builder privileges can craft a multipart upload with a filename containing ../ to delete arbitrary directories via rmSync and write arbitrary files via tarball extraction to any filesystem path the Node.js process can access. This issue has been patched in version 3.33.4.
Source: NIST National Vulnerability Database NVD
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-2026-35214 has been found in Budibase.
Attackers can target a specific entry point like POST /api/plugin/upload over the network to misuse the product.
Data can be tampered with by attackers. CVSS score: 8.7/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Budibase CVE-2026-35214" on the vendor's site.
CVE-2026-35214 (Budibase) — CWE-22 / CVSS v3 8.7
Attack vector: remote (network-reachable) / no user interaction
Attack surface: POST /api/plugin/upload
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.
Path traversal (CWE-22) exists in Budibase. Attackers reach the vulnerable code path via POST /api/plugin/upload.
Check the vendor advisory for the affected versions of Budibase. Attack surface: POST /api/plugin/upload.
Severity: High (CVSS 8.7/10). Data can be tampered with by attackers.
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 POST /api/plugin/upload requests with malformed payloads or SQL meta-characters. Run grep -r 'Budibase' . 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' . | 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を grep し、稼働しているサービス・バージョンを把握する。 -
2Hunt for indicators of compromise detect
grep 'POST /api/plugin/upload' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
POST /api/plugin/uploadへの異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。 -
3Post-deployment verification verify
Replay attack against POST /api/plugin/upload on staging to confirm patch closes the vector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 Step 2 と同じログクエリでアラート再発が無いか継続監視。
References
- exploit github.com
- patch security-advisories@github.com
- patch security-advisories@github.com
- web security-advisories@github.com