How severe is CVE-2026-27584?

CVE-2026-27584 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-27584 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27584?

CVE-2026-27584 affects Actualbudget Actual. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27584?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-27584 have an EU (EUVD) identifier?

Yes. CVE-2026-27584 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8526.

When was CVE-2026-27584 published?

CVE-2026-27584 was published on 2026-02-24 and last updated on 2026-06-17.

CVE-2026-27584

CVE-2026-27584 is a high-severity vulnerability in Actualbudget Actual with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 9.2
EPSS exploit prediction: 0% (32nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-8526
Weakness: CWE-306
Affected product: Actualbudget Actual
Published: 2026-02-24
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-27584?: CVE-2026-27584 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-27584 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (32nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27584?: CVE-2026-27584 affects Actualbudget Actual. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27584?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-27584 have an EU (EUVD) identifier?: Yes. CVE-2026-27584 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-8526.
When was CVE-2026-27584 published?: CVE-2026-27584 was published on 2026-02-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:actualbudget:actual:*:*:*:*:*:node.js:*:*

More vulnerabilities in Actualbudget Actual

CVE-2026-33318 — High (CVSS 8.8): Actual is a local-first personal finance tool. Prior to version 26.4.0, any authenticated user (including `BASIC` role)…
CVE-2026-27638 — High (CVSS 7.1): Actual is a local-first personal finance tool. Prior to version 26.2.1, in multi-user mode (OpenID), the sync API…
CVE-2026-3089 — Medium (CVSS 6.5): Actual Sync Server allows authenticated users to upload files through POST /sync/upload-user-file. In versions prior to…

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