CVE-2026-3089

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://fluidattacks.com/advisories/fugue	Exploit Third Party Advisory
https://github.com/actualbudget/actual	Product
https://github.com/actualbudget/actual/pull/7067	Issue Tracking Patch
https://fluidattacks.com/advisories/fugue	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:actualbudget:actual:*:*:*:*:*:node.js:*:*

History

No history.

Information

Published : 2026-03-09 14:16

Updated : 2026-06-17 10:43

NVD link : CVE-2026-3089

Mitre link : CVE-2026-3089

CVE.ORG link : CVE-2026-3089

JSON object : View

Products Affected

actualbudget

actual

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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