Is this vulnerability remotely exploitable?

Yes. If the ActualBudget Server instance is reachable over the network (for example, on the internet or a shared LAN), an attacker can exploit the issue remotely without a user account.

Does an attacker need valid credentials or an account?

No. The core problem is missing authentication middleware on specific integration endpoints, so any network client can query them without logging in.

What is the safest general fix pattern?

Ensure that all endpoints returning bank or user-specific financial data are protected by centralized authentication middleware and route-level access control. Adopting a default-deny posture for new routes helps prevent accidental exposure.

Severity:

HIGH RISK

(7.5)

Missing Authentication (CWE-306) on Bank Integration Endpoints in ActualBudget Server

CVE-2026-27584

Published:

Feb 24, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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March 7, 2026

Vulnerability Type

Category:

Missing Authentication

CWE:

CWE-306

Impact:

Exposure of Sensitive Financial Information

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

Vulnerability Type

Category:

Missing Authentication

CWE:

CWE-306

Impact:

Exposure of Sensitive Financial Information

Severity:

HIGH RISK

(7.5)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Missing Authentication (CWE-306) on Bank Integration Endpoints in ActualBudget Server

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.9)

Command Injection in MCP Stdio Configuration Validation (CWE-78) in WeKnora

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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