# CVE-2026-83744: invoiceninja Invoice Ninja invoices Endpoint Purify.php isHostSafe server-side request forgery

> Remote attackers can exploit an SSRF vulnerability in Invoice Ninja's invoice endpoint to access internal resources or bypass security controls.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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:** 2 Sep 2026
- **Also known as:** GHSA-wgqw-w7f3-xcj4

## What is CVE-2026-83744?

CVE-2026-83744 is a medium-severity server-side request forgery 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 security vulnerability has been detected in invoiceninja Invoice Ninja up to 5.13.26. This vulnerability affects the function Purify::isHostSafe of the file app/Services/Pdf/Purify.php of the component invoices Endpoint. The manipulation of the argument notes leads to server-side request forgery. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-83744?


## How do I fix CVE-2026-83744?

No fix has been published for CVE-2026-83744 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-83744 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-83744 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-83744 and fix it if it is affected.

What it is: CVE-2026-83744 is a medium-severity server-side request forgery 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-2026-83744 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-2026-83744/ (Markdown: https://insights.sbomify.com/CVE-2026-83744/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-83744
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-83744
- OSV: https://osv.dev/vulnerability/CVE-2026-83744

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-83744/
Summaries are generated and may contain mistakes; the official description above is the record.