What is GHSA-27vg-33gh-4hwg?

GHSA-27vg-33gh-4hwg is a security advisory published by GitHub Security Advisories with Medium severity. Actual Sync Server has an Authenticated Path Traversal

Which CVE IDs does GHSA-27vg-33gh-4hwg cover?

GHSA-27vg-33gh-4hwg covers the following CVE IDs: CVE-2026-3089. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

Which products are affected by GHSA-27vg-33gh-4hwg?

GHSA-27vg-33gh-4hwg affects 1 product, including: npm/@actual-app/sync-server:\u003c= 26.2.0.

GHSA-27vg-33gh-4hwgMedium

Actual Sync Server has an Authenticated Path Traversal

Vendor

GitHub Security Advisories

Published

March 10, 2026

Last Modified

March 10, 2026

🔗 CVE IDs covered (1)

CVE-2026-3089 →

📋 Description

Description

Actual Sync Server allows authenticated users to upload files through POST /sync/upload-user-file. In versions prior to 26.3.0, improper validation of the user-controlled x-actual-file-id header means that traversal segments (../) can escape the intended directory and write files outside userFiles.

Mitigations

The vulnerability can be mitigated in prior versions by running the sync server in a filesystem sandbox.

🎯 Affected products1

npm/@actual-app/sync-server:<= 26.2.0

🔗 References (7)

https://github.com/actualbudget/actual/security/advisories/GHSA-27vg-33gh-4hwg
https://nvd.nist.gov/vuln/detail/CVE-2026-3089
https://github.com/actualbudget/actual/pull/7067
https://github.com/actualbudget/actual/commit/18072e1d8b5281db43ded8b21433ee177bae9dfa
https://fluidattacks.com/advisories/fugue
https://github.com/actualbudget/actual
https://github.com/advisories/GHSA-27vg-33gh-4hwg