Skip to content
Patch Next
Sign inAdd to your agent

← Actionable
Critical, CVSS 9.6amended

Budibase has arbitrary file read by workspace-builder via PWA-zip symlink upload

CVE-2026-54352GHSA-w7mq-r738-x278

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (@budibase/server 3.39.9), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

Add to your agent

Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
9.6 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
EPSS
  • CVE-2026-54352: 0.49% estimated exploitation activity in the next 30 days; percentile 42.45 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Summary POST /api/pwa/process-zip at packages/server/src/api/routes/static.ts:24 accepts a builder-uploaded .zip, extracts it with extract-zip@2.0.1 into a temp directory, then for each entry listed in icons.json validates the icon path, opens it, and streams the bytes into MinIO. The resulting object is served back via GET /api/assets/{appId}/pwa/{uuid}.png. extract-zip@2.0.1 preserves absolute symlink targets when restoring symlink entries. The icon-source validator at packages/server/src/api/controllers/static/index.ts:259-268 resolves the icon source string against baseDir (path.resolve), checks resolvedSrc.startsWith(baseDir + path.sep) against that string, and calls fs.existsSync(resolvedSrc) which follows symbolic links to confirm the target exists. None of the three calls reject symbolic-link entries, so an entry stored at baseDir/evil.png but pointing at /data/.env passes the gate. packages/backend-core/src/objectStore/objectStore.ts:302 then calls (await…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-w7mq-r738-x278

  2. Revision 2 · amended ·

    Amended from osv record GHSA-w7mq-r738-x278

  3. Revision 1 · created ·

    Published from ghsa record GHSA-w7mq-r738-x278

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-54352

Advisory: Budibase has arbitrary file read by workspace-builder via PWA-zip symlink upload
IDs: CVE-2026-54352, GHSA-w7mq-r738-x278
Record: https://patchnext.com/advisories/cve-2026-54352 (revision 3, source checked 26 Oct 2026, 13:01 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @budibase/server 3.39.9. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @budibase/server: affected < 3.39.9; fixed in 3.39.9

## Suggested inspection (read-only)
- `npm ls @budibase/server --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @budibase/server.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-w7mq-r738-x278 (GitHub-reviewed advisory GHSA-w7mq-r738-x278 lists affected ranges: npm @budibase/server >=0 <3.39.9)
- Verified: https://osv.dev/vulnerability/GHSA-w7mq-r738-x278 (OSV record GHSA-w7mq-r738-x278 lists affected ranges: npm @budibase/server >=0 <3.39.9 (fixed))

Commands are suggestions: review each one before running it.

Loading voting…