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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2026-3089

Actual Sync Server 26.2.1 - Authenticated Path Traversal

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.This issue affects prior versions of Actual Sync Server 26.3.0.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Actual Actual Sync Server

Default version status: unaffected

  • 26.2.1affected

References