Vulnerability record · CVE-2026-3089 · published 9 March 2026

CVE-2026-3089: Actualbudget actual path traversal vulnerability

Actualbudget · Actual

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.

5.3 CVSS 4.0 Medium EPSS 0.45% · top 63.6% CWE-22 · Path traversal

5.3CVSS 4.0 base score

0.45%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

4References, 2 tagged exploit

17 Jun 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Actual Actualbudget

References

Link	Tags
https://fluidattacks.com/advisories/fugue	ExploitThird Party Advisory
https://github.com/actualbudget/actual	Product
https://github.com/actualbudget/actual/pull/7067	Issue TrackingPatch
https://fluidattacks.com/advisories/fugue	ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-3089), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.