CVE-2026-27584CWE-306

ActualBudget server is Missing Authentication for SimpleFIN and Pluggy AI bank sync endpoints

Critical · published February 24, 2026

CVSS v4.0
9.2
EPSS
1%
Percentile
49.3
In the wild
Unconfirmed
What it is

Actual is a local-first personal finance tool. Prior to version 26.2.1, missing authentication middleware in the ActualBudget server component allows any unauthenticated user to query the SimpleFIN and Pluggy.ai integration endpoints and read sensitive bank account balance and transaction information. This vulnerability allows an unauthenticated attacker to read the bank account balance and transaction history of ActualBudget users. This vulnerability impacts all ActualBudget Server users with the SimpleFIN or Pluggy.ai integrations configured. The ActualBudget Server instance must be reachable over the network. Version 26.2.1 patches the issue.

The record
Technical detail
CVSS v4.0
9.2 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
EPSS
0.00624 · 49.3th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-02-24T14:59Z
EPSS history
Timeline
  • 24 FEB 14:59Z
    ActualBudget server is Missing Authentication for SimpleFIN and Pluggy AI bank sync endpoints
    cvelistv5