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.
References (3)
Core 3
Core References
Vendor Advisory x_refsource_confirm
https://github.com/actualbudget/actual/security/advisories/GHSA-qmjj-p7m9-wjrv
Patch x_refsource_misc
https://github.com/actualbudget/actual/commit/9966c024cb75f57943193cac8e42f401efed9d08
Release Notes x_refsource_misc
https://github.com/actualbudget/actual/releases/tag/v26.2.1
Scores
CVSS v3
7.1
EPSS
0.0004
EPSS Percentile
11.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-862
Status
published
Products (2)
actual-app/sync-server
0 - 26.2.1npm
actualbudget/actual
< 26.2.1
Published
Feb 26, 2026
Tracked Since
Feb 27, 2026