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

Quick assessment

Affected

invoiceninja invoiceninja

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 5.13.28 版本之前的 Invoice Ninja 存在一个访问控制失效漏洞。该漏洞允许已认证的供应商门户联系人，利用仅验证作用域而未校验供应商所有权的授权检查机制，访问属于其他供应商或客户的文档。攻击者可通过向或接口发起请求，利用默认未设置导致 Hashid 文档标识符可预测且呈顺序递增的特性，枚举并读取公司内的任意发票 PDF、合同、付款收据及费用附件。

CVSS 6.5 · Medium Updated Nov 05, 2026

Possible ATT&CK Techniques 2 AI

T1078 · Valid Accounts T1203 · Exploitation for Client Execution

Affected Version Matrix 1

Vendor	Product	Version Range	Status
invoiceninja	invoiceninja	`< 5.13.28`	affected

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Vulnerability Information

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Vulnerability Title

Invoice Ninja < 5.13.28 Broken Access Control via Vendor Portal

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

通过用户控制密钥绕过授权机制

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
invoiceninja	invoiceninja	0 ~ 5.13.28	-

II. Public POCs for CVE-2026-82029

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-82029

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Other References for CVE-2026-82029 (3)

https://github.com/invoiceninja/invoiceninja/commit/4895dce820e37b849b34af46548afd8520bb81d1 patch
https://github.com/invoiceninja/invoiceninja/releases/tag/v5.13.28 release-notes
https://www.vulncheck.com/advisories/invoice-ninja-broken-access-control-via-vendor-portal third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-82029

IV. Related Vulnerabilities

Same product: invoiceninja

Same vendor: invoiceninja

Same weakness: CWE-639