Vulnerability · Published Nov 4, 2026 · Assigned by VulnCheck

CVE-2026-82029Invoice Ninja < 5.13.28 Broken Access Control via Vendor Portal

Medium 6.5

In plain English

A medium-severity authorization bypass via user-controlled key in invoiceninja from invoiceninja. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 15% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.2%top 85.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
invoiceninja	invoiceninja	0 – before 5.13.28

Weakness: CWE-639, CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

References

Fixed Release Tag release-notes
Patch Commit patch
VulnCheck Advisory: Invoice Ninja < 5.13.28 Broken Access Control via Vendor Portal third-party-advisory