CVE-2026-34365: InvoiceShelf: SSRF in Estimate PDF Rendering via Unsanitised HTML in Notes Field
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 Estimate PDF generation module. User-supplied HTML in the estimate 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 preview and customer view endpoints regardless of whether automated email attachments are enabled. This issue has been patched in version 2.2.0.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
InvoiceShelfto a version that resolves this vulnerability.Fixed in 2.2.0
Event History
Frequently Asked Questions
What is the severity of CVE-2026-34365?
CVE-2026-34365 is classified as a high severity vulnerability due to its potential for exploitation via Server-Side Request Forgery.
How do I fix CVE-2026-34365?
To remediate CVE-2026-34365, upgrade to InvoiceShelf version 2.2.0 or later where the vulnerability has been addressed.
What type of vulnerability is CVE-2026-34365?
CVE-2026-34365 is a Server-Side Request Forgery (SSRF) vulnerability.
Which software versions are affected by CVE-2026-34365?
InvoiceShelf versions prior to 2.2.0 are affected by CVE-2026-34365.
In what component is the CVE-2026-34365 vulnerability found?
The vulnerability in CVE-2026-34365 is found in the Estimate PDF Rendering feature of the InvoiceShelf application.