CVE-2026-27584 is a critical authentication bypass vulnerability in ActualBudget, a local-first personal finance tool, affecting versions prior to 26.2.1. It allows unauthenticated attackers to query SimpleFIN and Pluggy.ai integration endpoints, exposing sensitive bank account balance and transaction data for users with these integrations configured. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity and no user interaction, leading to a complete compromise of confidentiality. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 26.2.1CPE matchmatch criteria | cpe:2.3:a:actualbudget:actual:*:*:*:*:*:node.js:*:* |
CVSS version used by this source: 4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.