CVE-2026-33318— Actual has Privilege Escalation via 'change-password' Endpoint on OpenID-Migrated Servers

Actual has Privilege Escalation via 'change-password' Endpoint on OpenID-Migrated Servers

Actual is a local-first personal finance tool. Prior to version 26.4.0, any authenticated user (including `BASIC` role) can escalate to `ADMIN` on servers migrated from password authentication to OpenID Connect. Three weaknesses combine: `POST /account/change-password` has no authorization check, allowing any session to overwrite the password hash; the inactive password `auth` row is never removed on migration; and the login endpoint accepts a client-supplied `loginMethod` that bypasses the server's active auth configuration. Together these allow an attacker to set a known password and authenticate as the anonymous admin account created during the multiuser migration. The three weaknesses form a single, sequential exploit chain — none produces privilege escalation on its own. Missing authorization on POST /change-password allows overwriting a password hash, but only matters if there is an orphaned row to target. Orphaned password row persisting after migration provides the target row, but is harmless without the ability to authenticate using it. Client-controlled loginMethod: "password" allows forcing password-based auth, but is useless without a known hash established by step 1. All three must be chained in sequence to achieve the impact. No single weakness independently results in privilege escalation. The single root cause is the missing authorization check on /change-password; the other two are preconditions that make it exploitable. Version 26.4.0 contains a fix.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

访问控制不恰当

actual 访问控制错误漏洞

actual是Actual开源的一个个人理财工具。 Actual 26.4.0之前版本存在访问控制错误漏洞，该漏洞源于/account/change-password端点缺少授权检查，结合迁移后未移除的密码认证行和客户端控制的loginMethod参数，可能导致任何经过身份验证的用户提升为ADMIN权限。

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