Path Traversal in Budibase
CVE-2026-30240
Budibase is a low code platform for creating internal tools, workflows, and admin panels. In 3.31.5 and earlier, a path traversal vulnerability in the PWA (Progressive Web App) ZIP processing endpoint (POST /api/pwa/process-zip) allows an authenticated user with builder privileges to read arbitrary files from the server filesystem, including /proc/1/environ which contains all environment variables — JWT secrets, database credentials, encryption keys, and API tokens. The server reads attacker-specified files via unsanitized path.join() with user-controlled input from icons.json inside the uploaded ZIP, then uploads the file contents to the object store (MinIO/S3) where they can be retrieved through signed URLs. This results in complete platform compromise as all cryptographic secrets and service credentials are exfiltrated in a single request.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (22.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Budibase — versions <= 3.31.5
Weakness classification (CWE)
References
- github.com/Budibase/budibase/security/advisories/GHSA-pqcr-jmfv-c9cp (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-30240?
- CVE-2026-30240 is a critical-severity vulnerability in Budibase, classified under Path Traversal. CVSS score: 9.6/10. Published 2026-03-09.
- How severe is CVE-2026-30240?
- Critical severity. CVSS v3 base score is 9.6 out of 10.