CVE-2026-3089

MEDIUM EPSS 29.6%
Published Mar 9, 20263mo ago · Modified Apr 9, 20262mo ago
5.3 CVSS 4.0
Medium
Find Similar
Published Mar 9, 2026 3mo ago
Last Modified Apr 9, 2026 2mo ago

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.

CVSS Details

Base Score
5.3
Exploitability
—
Impact
—
Vector string
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:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
29.6% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

Affected Products 1

VendorProductVersionRange
actualbudgetactual* <26.3.0

References 3

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

Remediation

  • github.com https://github.com/actualbudget/actual/pull/7067
    Issue TrackingPatch