TI-2026-26652 Aliases CVE-2026-34366

InvoiceShelf: SSRF in Payment Receipt PDF Rendering via Unsanitised HTML in Notes Field

HIGH 68CWE-918Published 2026-03-31 · Updated 2026-04-01

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · None
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00249 16th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Fixed InvoiceShelf (InvoiceShelf): 2.2.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
InvoiceShelf	InvoiceShelf	before 2.2.0	2.2.0	Patch available	CNA

InvoiceShelf VendorInvoiceShelf Affected before 2.2.0 Fixed in 2.2.0 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:invoiceshelf:invoiceshelf::::::::	before 2.2.0	Vulnerable	InvoiceShelf

cpe:2.3:a:invoiceshelf:invoiceshelf:*:*:*:*:*:*:*:* Versions before 2.2.0 Vulnerable ·InvoiceShelf

Remediation

Fix · CNA InvoiceShelf (InvoiceShelf) Fixed in 2.2.0

Timeline

2026-10-02 Threatist record created from CVE-2026-34366

References

Exploit 1

https://github.com/InvoiceShelf/InvoiceShelf/security/advisories/GHSA-38hf-fq8x-q49r

Other 1

https://github.com/InvoiceShelf/InvoiceShelf/releases/tag/2.2.0

TI-2026-26653 InvoiceShelf: SSRF in Invoice PDF Rendering via Unsanitised HTML in Notes Field CVSS 3.1HIGH 8.7
TI-2026-26651 InvoiceShelf: SSRF in Estimate PDF Rendering via Unsanitised HTML in Notes Field CVSS 3.1HIGH 8.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences