# CVE-2026-104905: FacturaScripts < 2026.7 PHP Object Injection via WidgetSelect

> Authenticated attackers can exploit PHP object injection in FacturaScripts to delete arbitrary files, causing denial of service and potential application hijack.

- **Severity:** Medium 6.1 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **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:** 5 Oct 2026
- **Updated:** 5 Oct 2026
- **Also known as:** GHSA-8rvh-x87q-rm2p, GHSA-p89j-gj6f-fh6g

## What is CVE-2026-104905?

CVE-2026-104905 is a medium-severity unsafe deserialization vulnerability in NeoRazorX facturascripts, published on 5 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

FacturaScripts before version 2026.7 contains a PHP object injection vulnerability in WidgetSelect::processFormData() that allows authenticated attackers to trigger unserialize() on raw POST data without an allowed_classes filter for multiple-select fields. Attackers can submit a serialized XLSXWriter object as the field value to invoke its __destruct() method, deleting arbitrary attacker-specified files such as config.php or backup data, resulting in denial of service and potential application reinstall hijack.

Weakness: CWE-502 (Deserialization of Untrusted Data)

## Which versions are affected by CVE-2026-104905?


## How do I fix CVE-2026-104905?

No fix has been published for CVE-2026-104905 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-104905 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-104905 exists.

Public exploit code:

- PHP Object Injection -> Arbitrary File Deletion in FacturaScripts <= 2026.66 (CWE-502). PoC + advisory. (github_poc): https://github.com/wvllxe/CVE-2026-104905-facturascripts-object-injection

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-104905 and fix it if it is affected.

What it is: CVE-2026-104905 is a medium-severity unsafe deserialization vulnerability in NeoRazorX facturascripts, published on 5 Oct 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-2026-104905 exists.

Affected product: NeoRazorX facturascripts. 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-2026-104905/ (Markdown: https://insights.sbomify.com/CVE-2026-104905/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-104905
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104905
- OSV: https://osv.dev/vulnerability/CVE-2026-104905

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-104905/
Summaries are generated and may contain mistakes; the official description above is the record.