Quick answers
- Is CVE-2026-42879 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-42879 being exploited in the wild.
- How severe is CVE-2026-42879?
- Medium severity, with a CVSS score of 6.3, published 27 May 2026.
- Which products and versions are affected?
- NeoRazorX FacturaScripts <= 2025.81; facturascripts/facturascripts (Packagist) <= 2025.81, ECOSYSTEM:introduced=0,last_affected=2025.81.
- Is there a fix for CVE-2026-42879?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-42879 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-42879?
- Check whether you run NeoRazorX FacturaScripts or facturascripts/facturascripts (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An authenticated unrestricted file upload vulnerability exists in the `addImageAction()` method of `Core/Lib/ExtendedController/ProductImagesTrait.php`. The application validates file uploads by checking if the MIME type contains the string 'image/', which can be spoofed by prepending GIF89a magic bytes to a PHP payload. Because the system preserves the original file extension and stores the file in a web-accessible directory (`/MyFiles/YYYY/MM/`), an attacker can upload a `.php` file and execute it via a direct URL request. This results in Remote Code Execution (RCE) with the privileges of the web server user.
Affected products
- NeoRazorX FacturaScripts <= 2025.81
Identifiers
- CVE-2026-42879
- GHSA-vf3q-frmr-vrr9
Timeline
- 2026-05-07: advisory: GitHub Advisory published
- 2026-05-27: disclosed: NVD publication date