CVE-2026-27638

MEDIUM EPSS 21.2%
Published Feb 26, 20264mo ago · Modified Jun 17, 20262w ago
5.7 CVSS 4.0
Medium
Find Similar
Published Feb 26, 2026 4mo ago
Last Modified Jun 17, 2026 2w ago

Description

Actual is a local-first personal finance tool. Prior to version 26.2.1, in multi-user mode (OpenID), the sync API endpoints (`/sync/*`) don't verify that the authenticated user owns or has access to the file being operated on. Any authenticated user can read, modify, and overwrite any other user's budget files by providing their file ID. Version 26.2.1 patches the issue.

CVSS Details

Base Score
5.7
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/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
21.2% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-862 Missing Authorization Authorization

Affected Products 1

VendorProductVersionRange
actualbudgetactual* <26.2.1

References 3

  • github.com https://github.com/actualbudget/actual/commit/9966c024cb75f57943193cac8e42f401efed9d08
    Patch
  • github.com https://github.com/actualbudget/actual/releases/tag/v26.2.1
    ProductRelease Notes
  • github.com https://github.com/actualbudget/actual/security/advisories/GHSA-qmjj-p7m9-wjrv
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/actualbudget/actual/commit/9966c024cb75f57943193cac8e42f401efed9d08
    Patch