CVE-2026-27584 | THREATINT

Description

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.

PUBLISHED Reserved 2026-02-20 | Published 2026-02-24 | Updated 2026-02-24 | Assigner GitHub_M

CRITICAL: 9.2CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N

Problem types

CWE-306: Missing Authentication for Critical Function

Product status

< 26.2.1

affected

References

github.com/...actual/security/advisories/GHSA-m2cq-xjgm-f668

github.com/...ommit/ea937d100956ca56689ff852d99c28589e2a7d88

cve.org (CVE-2026-27584)

nvd.nist.gov (CVE-2026-27584)

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