VULNERABILITY INTELLIGENCE

CVE-2026-3089

CVSS score6.5 MEDIUM
EPSS probability0.39%
CISA KEVNot currently listed
Published2026-03-09
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

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.

Weakness classification

  • help@fluidattacks.com: CWE-22

Primary references