# CVE-2026-83743: invoiceninja Invoice Ninja Vendor Portal Profile Update profile authorization

> Remote attackers can bypass authorization checks in the Vendor Portal to modify vendor contact profiles, requiring an upgrade to fix.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Sep 2026
- **Updated:** 1 Sep 2026
- **Also known as:** GHSA-g3xg-fvr3-p54f

## What is CVE-2026-83743?

CVE-2026-83743 is a medium-severity missing authorization vulnerability in invoiceninja Invoice Ninja, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A weakness has been identified in invoiceninja Invoice Ninja up to 5.13.26. This affects an unknown part of the file /vedor/profile/ of the component Vendor Portal Profile Update. Executing a manipulation of the argument vendor_contact can lead to authorization bypass. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. Upgrading to version 5.13.27 is able to mitigate this issue. This patch is called f86fd9697ce7bd0d28adbe2e6c5890780482ea90. The affected component should be upgraded.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key), CWE-285 (Improper Authorization)

## Which versions are affected by CVE-2026-83743?


## How do I fix CVE-2026-83743?

No fix has been published for CVE-2026-83743 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-83743 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-83743 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-83743 and fix it if it is affected.

What it is: CVE-2026-83743 is a medium-severity missing authorization vulnerability in invoiceninja Invoice Ninja, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-83743 exists.

Affected product: invoiceninja Invoice Ninja. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-83743/ (Markdown: https://insights.sbomify.com/CVE-2026-83743/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-83743
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-83743
- OSV: https://osv.dev/vulnerability/CVE-2026-83743

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-83743/
Summaries are generated and may contain mistakes; the official description above is the record.