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TI-2026-39244 Aliases CVE-2026-54352GHSA-w7mq-r738-x278

Budibase: Arbitrary file read by workspace-builder via PWA-zip symlink upload

Priority HIGH 76CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.

Summary

Budibase is an open-source low-code platform. Prior to 3.39.9, `POST /api/pwa/process-zip` at packages/server/src/api/routes/static.ts:24 accepts a builder-uploaded .zip, extracts it with [email protected] 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. [email protected] 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. packages/backend-core/src/objectStore/objectStore.ts:302 then calls (await fsp.open(path)).createReadStream() on the resolved path. fsp.open follows the symlink, the target file's bytes stream into MinIO, and the response of the asset-fetch endpoint returns those bytes verbatim. Result: a workspace-level builder reads any file the server process can open. This vulnerability is fixed in 3.39.9.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00494 42nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed budibase (Budibase): 3.39.9@budibase/server (npm): 3.39.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Budibasebudibasebefore 3.39.93.39.9Patch availableCNA
—@budibase/server (npm)before 3.39.93.39.9Patch availableGHSA-w7mq-r738-x278
  • budibase VendorBudibase Affected before 3.39.9 Fixed in 3.39.9 Patch available CNA
  • @budibase/server (npm) Vendor— Affected before 3.39.9 Fixed in 3.39.9 Patch available GHSA-w7mq-r738-x278

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:budibase:budibase:*:*:*:*:*:*:*:*before 3.39.9VulnerableBudibase
  • cpe:2.3:a:budibase:budibase:*:*:*:*:*:*:*:* Versions before 3.39.9 Vulnerable ·Budibase

Remediation

  • Fix · CNA budibase (Budibase) Fixed in 3.39.9
  • Fix · GHSA-w7mq-r738-x278 @budibase/server (npm) Fixed in 3.39.9 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-54352
  2. 2026-10-03 Alias added: GHSA-w7mq-r738-x278

References

Exploit 1

Advisory 1

Other 1

  • TI-2026-39242 Budibase: Anonymous NoSQL operator injection via published-app query templates CVSS 3.1CRITICAL 10.0
  • TI-2026-24369 Budibase Universal Auth Bypass via Webhook Query Param Injection CVSS 3.1CRITICAL 9.1
  • TI-2026-39243 Budibase: Mass Assignment in Webhook Trigger Allows Cross-Workspace Automation Execution via appId Override CVSS 3.1CRITICAL 9.6
  • TI-2026-24371 Budibase: Server-Side Request Forgery via REST Connector with Empty Default Blacklist CVSS 3.1CRITICAL 9.9
  • TI-2026-23473 Budibase PWA ZIP Upload Path Traversal Allows Reading Arbitrary Server Files Including All Environment Secrets CVSS 3.1CRITICAL 9.6
  • TI-2026-22078 Budibase Vulnerable to Remote Code Execution via Unsafe eval() in View Filter Map Function (Budibase Cloud) CVSS 3.1CRITICAL 9.9
See all 24 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences