CVE-2026-94039 vas3k TaxHacker Invoice PDF Renderer actions.ts generateInvoicePDF server-side request forgery
Remote attackers can exploit a server-side request forgery vulnerability in the Invoice PDF Renderer to access internal resources or bypass security controls.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-94039?
CVE-2026-94039 is a medium-severity server-side request forgery vulnerability in vas3k TaxHacker, published on 20 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability was detected in vas3k TaxHacker up to 0.8.5. Affected is the function generateInvoicePDF of the file /apps/invoices/actions.ts of the component Invoice PDF Renderer. Performing a manipulation of the argument businessLogo results in server-side request forgery. The attack is possible to be carried out remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Weakness: CWE-918
Which versions are affected by CVE-2026-94039?
How do I fix CVE-2026-94039?
No fix has been published for CVE-2026-94039 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-94039 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-94039 exists.
Sources
Also known as GHSA-gc9f-gc68-qrg3.