Is CVE-2026-55385 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-55385 being exploited in the wild.

How severe is CVE-2026-55385?

Medium severity, with a CVSS score of 6.8, published 14 October 2026.

Is there a fix for CVE-2026-55385?

Yes: fixed in 2.4.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-55385 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-55385?

Check whether you run Invoiceshelf 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.

CVE-2026-55385: InvoiceShelf server-side request forgery in PDF generation

CVE-2026-55385 · Severity: medium · CVSS 6.8 · Published 2026-10-14

InvoiceShelf is an open-source invoicing and expense-tracking application. Before version 2.4.0, an administrator can configure the application to send invoice data (including customer names, addresses, and totals) to any URL, including private networks or cloud metadata endpoints, by exploiting insufficient validation of the Gotenberg PDF host setting. This allows attackers with admin access to exfiltrate customer data or reach internal services.

Technologies: Invoiceshelf. Vendors: Invoiceshelf.

Quick answers

Is CVE-2026-55385 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-55385 being exploited in the wild.
How severe is CVE-2026-55385?: Medium severity, with a CVSS score of 6.8, published 14 October 2026.
Which products and versions are affected?: Invoiceshelf before 2.4.0.
Is there a fix for CVE-2026-55385?: Yes: fixed in 2.4.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-55385 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-55385?: Check whether you run Invoiceshelf 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.

How to fix

Fixed in: 2.4.0

Technical details

The vulnerability is a server-side request forgery (SSRF) in the PDF generation component. PDFConfigurationRequest validates the owner-controlled gotenberg_host setting only as a syntactically valid URL, permitting private, loopback (127.0.0.1), link-local (169.254.169.254), and reserved addresses. GotenbergPDFDriver then sends multipart HTTP POST requests containing rendered invoice HTML to that host without additional validation, allowing an authenticated admin to reach internal services or cloud metadata endpoints. The fix adds SafeRemoteUrl validation to reject private/reserved address ranges at configuration time and defensively re-checks before each outbound call.

Affected products

InvoiceShelf InvoiceShelf before 2.4.0

Timeline

2026-10-14: disclosed
2026-06-12: patched: Fix committed before public disclosure

References

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