# CVE-2026-1906: Missing authorization in PDF Invoices & Packing Slips for WooCommerce

> Authenticated subscribers can modify Peppol identifiers for any order due to missing authorization checks, potentially causing payment disruptions and data leakage.

- **Severity:** Medium 4.3 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A: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:** 18 Feb 2026
- **Updated:** 8 Apr 2026
- **Also known as:** GHSA-rgq3-q5rc-mjc3

## What is CVE-2026-1906?

CVE-2026-1906 is a medium-severity missing authorization vulnerability in wpovernight PDF Invoices & Packing Slips for WooCommerce, published on 18 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

The PDF Invoices & Packing Slips for WooCommerce plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 5.6.0 via the `wpo_ips_edi_save_order_customer_peppol_identifiers` AJAX action due to missing capability checks and order ownership validation. This makes it possible for authenticated attackers, with Subscriber-level access and above, to modify Peppol/EDI endpoint identifiers (`peppol_endpoint_id`, `peppol_endpoint_eas`) for any customer by specifying an arbitrary `order_id` parameter on systems using Peppol invoicing. This can affect order routing on the Peppol network and may result in payment disruptions and data leakage.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-1906?


## How do I fix CVE-2026-1906?

No fix has been published for CVE-2026-1906 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-1906 being exploited?

There is no known exploitation of CVE-2026-1906 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-1906 and fix it if it is affected.

What it is: CVE-2026-1906 is a medium-severity missing authorization vulnerability in wpovernight PDF Invoices & Packing Slips for WooCommerce, published on 18 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-1906 in the wild and no public exploit code.

Affected product: wpovernight PDF Invoices & Packing Slips for WooCommerce. 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-2026-1906/ (Markdown: https://insights.sbomify.com/CVE-2026-1906/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-1906
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-1906
- OSV: https://osv.dev/vulnerability/CVE-2026-1906

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-1906/
Summaries are generated and may contain mistakes; the official description above is the record.