CVE-2026-3089

N/A

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.

CVE Details

CVSS v3.1 ScoreN/A

Published3/9/2026

Last Modified3/11/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-22

References

https://fluidattacks.com/advisories/fugue(help@fluidattacks.com)

https://github.com/actualbudget/actual(help@fluidattacks.com)

https://github.com/actualbudget/actual/pull/7067(help@fluidattacks.com)

https://fluidattacks.com/advisories/fugue(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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