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CVE Vulnerability Details :
CVE-2026-27638
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-26 Feb, 2026 | 22:14
Updated At-26 Feb, 2026 | 22:14
Rejected At-
▼CVE Numbering Authority (CNA)
ActualBudget missing authorization in sync endpoints allows cross-user budget file access in multi-user mode

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.

Affected Products
Vendor
actualbudget
Product
actual
Versions
Affected
  • < 26.2.1
Problem Types
TypeCWE IDDescription
CWECWE-862CWE-862: Missing Authorization
Type: CWE
CWE ID: CWE-862
Description: CWE-862: Missing Authorization
Metrics
VersionBase scoreBase severityVector
4.05.7MEDIUM
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
Version: 4.0
Base score: 5.7
Base severity: MEDIUM
Vector:
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
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/actualbudget/actual/security/advisories/GHSA-qmjj-p7m9-wjrv
x_refsource_CONFIRM
https://github.com/actualbudget/actual/commit/9966c024cb75f57943193cac8e42f401efed9d08
x_refsource_MISC
https://github.com/actualbudget/actual/releases/tag/v26.2.1
x_refsource_MISC
Hyperlink: https://github.com/actualbudget/actual/security/advisories/GHSA-qmjj-p7m9-wjrv
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/actualbudget/actual/commit/9966c024cb75f57943193cac8e42f401efed9d08
Resource:
x_refsource_MISC
Hyperlink: https://github.com/actualbudget/actual/releases/tag/v26.2.1
Resource:
x_refsource_MISC
Details not found