Vulnerability · Published Mar 31, 2026 · Assigned by GitHub_M
CVE-2026-34366InvoiceShelf: SSRF in Payment Receipt PDF Rendering via Unsanitised HTML in Notes Field
High 7.6
In plain English
A high-severity server-side request forgery in InvoiceShelf from InvoiceShelf. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).
Official description
InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and create professional invoices and estimates. Prior to version 2.2.0, a Server-Side Request Forgery (SSRF) vulnerability exists in the Payment receipt PDF generation module. User-supplied HTML in the payment Notes field is passed unsanitised to the Dompdf rendering library, which will fetch any remote resources referenced in the markup. The vulnerability is exploitable directly via the PDF receipt endpoint, regardless of whether automated email attachments are enabled. This issue has been patched in version 2.2.0.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| InvoiceShelf | InvoiceShelf | < 2.2.0 |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N
References
- https://github.com/InvoiceShelf/InvoiceShelf/security/advisories/GHSA-38hf-fq8x-q49r x_refsource_CONFIRM
- https://github.com/InvoiceShelf/InvoiceShelf/releases/tag/2.2.0 x_refsource_MISC