Auth bypass in Actualbudget Actual
CVE-2026-27584
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.
Vulnerability class: Broken Authentication
EPSS: 0.004 (33.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Actualbudget Actual — versions < 26.2.1
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-27584?
- CVE-2026-27584 is a high-severity vulnerability in Actualbudget Actual, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-02-24.
- How severe is CVE-2026-27584?
- High severity. CVSS v3 base score is 7.5 out of 10.