---
id: CVE-2026-55610
title: >-
  InvoiceShelf is an open-source web & mobile app that helps track expenses,
  payments and create professional invoices and estimates
summary: >-
  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 co…
severity: high
cvss: 8.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N'
cwe:
  - CWE-639
vendor: InvoiceShelf
product: InvoiceShelf
affected:
  - InvoiceShelf < 2.4.1
published: '2026-09-23'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T20:17:11.580'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55610'
references:
  - url: >-
      https://github.com/InvoiceShelf/InvoiceShelf/security/advisories/GHSA-vgx6-6cqr-m8qr
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-23T18:14:01.010220Z'
ingestedAt: '2026-09-23T15:26:23.420Z'
epss: 0.00304
epssPercentile: 0.20691
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.