CVE-2026-82029

Medium

Description

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.

SeverityMedium

CVSS6.5

Exploit probability—

ProductInvoiceninja

PublishedNov 4, 2026

First seenNov 4, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key CWE-862Missing authorization

How to fix

Update

invoiceninja invoiceninja5.13.28 or later

Patches

github.com/invoiceninja/invoiceninja/commit/4895dce820e37b849b34af46548afd8520bb81d1

Vendor advisories

github.com/invoiceninja/invoiceninja/releases/tag/v5.13.28

Affected products

Product	Affected versions	Fixed in
invoiceninja invoiceninja	v < 5.13.28	5.13.28

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