CVE-2026-42879 FacturaScripts: Authenticated Remote Code Execution (RCE) via GIF Image Upload in Product Images
Authenticated attackers can upload malicious PHP files disguised as GIFs to achieve remote code execution in FacturaScripts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-42879?
CVE-2026-42879 is a medium-severity vulnerability in NeoRazorX facturascripts, published on 27 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
FacturaScripts is an open source accounting and invoicing software. In 2025.81 and earlier, an authenticated unrestricted file upload vulnerability exists in FacturaScripts' product image upload functionality. An attacker with valid credentials can upload a PHP file disguised as a GIF image (using a GIF89a header), bypassing MIME type validation. The file is stored with its original extension, including executable extensions such as .php. The vulnerability exists the addImageAction() method of Core/Lib/ExtendedController/ProductImagesTrait.php.
Which versions are affected by CVE-2026-42879?
2 open source packages ship an affected version, including facturascripts/facturascripts.
| Package | Affected | Fixed in |
|---|---|---|
facturascripts/facturascripts Packagist | All versions to 2025.81 | None |
facturascripts/facturascripts Packagist | All versions to 2025.81 | None |
How do I fix CVE-2026-42879?
No fix has been published for CVE-2026-42879 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-42879 being exploited?
There is no known exploitation of CVE-2026-42879 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-vf3q-frmr-vrr9.