Vulnerability · Published Sep 23, 2026 · Assigned by GitHub_M
CVE-2026-55610InvoiceShelf has cross-company user read/update IDOR that enables cross-tenant account takeover
High 8.7
In plain English
A high-severity authorization bypass via user-controlled key in InvoiceShelf from InvoiceShelf. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Official description
InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and create professional invoices and estimates. Prior to version 2.4.1, in InvoiceShelf's multi-company installations, any user who is an Owner of one company can read and overwrite any user account in any other company on the same installation. `GET/PUT /api/v1/users/{user}` resolves the target `User` by global primary key, and `UserPolicy` checks only that the requester owns their own header-company — it never verifies that the target user belongs to that company. This allows cross-tenant disclosure of user data and full account takeover (email/password overwrite + company re-assignment). Version 2.4.1 fixes the issue.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| InvoiceShelf | InvoiceShelf | < 2.4.1 |
Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N