---
id: CVE-2026-82029
title: Invoice Ninja < 5.13.28 Broken Access Control via Vendor Portal
summary: >-
  Invoice Ninja before 5.13.28 contains a broken access control vulnerability
  that allows authenticated vendor-portal contacts to access documents belonging
  to other vendors and clients by exploiting authorization checks that validate
  only…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-639
  - CWE-862
vendor: invoiceninja
product: invoiceninja
affected:
  - invoiceninja < 5.13.28
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T19:09:52.914547Z'
published: '2026-11-04'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T19:10:09.410Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-82029'
references:
  - url: 'https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.28'
    label: Fixed Release Tag
  - url: >-
      https://github.com/invoiceninja/invoiceninja/commit/4895dce820e37b849b34af46548afd8520bb81d1
    label: Patch Commit
  - url: >-
      https://www.vulncheck.com/advisories/invoice-ninja-broken-access-control-via-vendor-portal
    label: >-
      VulnCheck Advisory: Invoice Ninja < 5.13.28 Broken Access Control via
      Vendor Portal
tags:
  - cve.org
epss: 0.00235
epssPercentile: 0.14589
ingestedAt: '2026-11-05T22:38:31.513Z'
---

## Overview

Invoice Ninja before 5.13.28 contains a broken access control vulnerability that allows authenticated vendor-portal contacts to access documents belonging to other vendors and clients by exploiting authorization checks that validate only company_id scope instead of vendor ownership. Attackers can request GET /vendor/documents/{hashid}/download or POST /vendor/documents/download_multiple, enumerating predictable sequential Hashids document identifiers due to a default empty HASH_SALT, to read any invoice PDFs, contracts, payment receipts, and expense attachments within the company.

## Affected

- `invoiceninja < 5.13.28`

## Remediation

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