# CVE-2026-44826: Vvveb: Vvveb CMS — Negative-quantity cart manipulation allows creation of orders with negative grand totals

> Attackers can create orders with negative totals by submitting negative quantities, causing financial data corruption in the merchant's database.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 May 2026
- **Updated:** 15 May 2026
- **Also known as:** GHSA-75x2-j47j-mg8j

## What is CVE-2026-44826?

CVE-2026-44826 is a high-severity vulnerability in givanz Vvveb, published on 15 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Vvveb is a powerful and easy to use CMS with page builder to build websites, blogs or ecommerce stores. Prior to 1.0.8.2, Vvveb CMS does not validate the sign of the quantity parameter on the cart-add endpoint. Submitting a negative integer is accepted by the server and treated as a normal positive line-item, but with the sign carried through into every downstream computation: line total, sub-total, taxes, and grand total all become negative numbers. The customer-facing cart UI then displays a negative grand total to the user, the checkout flow accepts the negative cart, and the resulting order is persisted in the merchant's database with a negative total column. From the merchant's order management dashboard, this surfaces as a real order with a negative total — an "the merchant owes the customer money" record that no legitimate workflow ever creates. This vulnerability is fixed in 1.0.8.2.

Weakness: CWE-1284 (Improper Validation of Specified Quantity in Input)

## Which versions are affected by CVE-2026-44826?


## How do I fix CVE-2026-44826?

No fix has been published for CVE-2026-44826 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-44826 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44826 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-44826 and fix it if it is affected.

What it is: CVE-2026-44826 is a high-severity vulnerability in givanz Vvveb, published on 15 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44826 exists.

Affected product: givanz Vvveb. 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-2026-44826/ (Markdown: https://insights.sbomify.com/CVE-2026-44826/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-44826
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-44826
- OSV: https://osv.dev/vulnerability/CVE-2026-44826

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-44826/
Summaries are generated and may contain mistakes; the official description above is the record.