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CVE-2026-27584— ActualBudget server is Missing Authentication for SimpleFIN and Pluggy AI bank sync endpoints

Quick assessment

Affected
actualbudget actual
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

actual是Actual开源的一个个人理财工具。 Actual 26.2.1之前版本存在访问控制错误漏洞，该漏洞源于ActualBudget服务器组件缺少身份验证中间件，可能导致未经验证的用户读取敏感银行账户信息。

AI Predicted 7.5 Difficulty: Easy EPSS 0.56% · P45

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-27584

Vulnerability Information
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Vulnerability Title
ActualBudget server is Missing Authentication for SimpleFIN and Pluggy AI bank sync endpoints
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
actual 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
actual是Actual开源的一个个人理财工具。 Actual 26.2.1之前版本存在访问控制错误漏洞，该漏洞源于ActualBudget服务器组件缺少身份验证中间件，可能导致未经验证的用户读取敏感银行账户信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
actualbudget actual < 26.2.1 -

II. Public POCs for CVE-2026-27584

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III. Intelligence Information for CVE-2026-27584

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Vendor Advisories for CVE-2026-27584 (1)

IV. Related Vulnerabilities

Same product: actual
Same vendor: actualbudget
Same weakness: CWE-306

V. Comments for CVE-2026-27584

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