Security Advisory

CVE-2026-3089

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-03-09 14:08:55

Last updated 2026-03-09 14:54:24

Assigner Fluid Attacks

State PUBLISHED

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.

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