CVE-2026-27638

ActualBudget missing authorization in sync endpoints allows cross-user budget file access in multi-user mode

CVSS 5.7 MEDIUMEPSS 0.3%CWE-862

Vexday Risk Score

13Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 5.7EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

26 feb 2026Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

Actual is a local-first personal finance tool. Prior to version 26.2.1, in multi-user mode (OpenID), the sync API endpoints (`/sync/*`) don't verify that the authenticated user owns or has access to the file being operated on. Any authenticated user can read, modify, and overwrite any other user's budget files by providing their file ID. Version 26.2.1 patches the issue.

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

Productos afectados

actualbudget · actual

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Referencias

https://github.com/actualbudget/actual/commit/9966c024cb75f57943193cac8e42f401efed9d08 https://github.com/actualbudget/actual/releases/tag/v26.2.1 https://github.com/actualbudget/actual/security/advisories/GHSA-qmjj-p7m9-wjrv