TI-2026-74463 Aliases CVE-2026-55387

InvoiceShelf bulk deletion lets users delete other companies' records

HIGH 65CWE-284Published 2026-10-14 · Updated 2026-10-15

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

InvoiceShelf versions 2.3.3 and earlier validate bulk-delete requests for customers, estimates, expenses, invoices, items, payments and users without consistently checking company ownership of the record identifiers, which is an authorization bypass through a user-controlled key (CWE-639). An authenticated user with low privileges can submit another company's identifier and delete that company's records.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and create professional invoices and estimates. In version 2.3.3 and earlier, InvoiceShelf bulk-delete request validation accepts record identifiers without consistently binding them to the authenticated user's company_id. The affected DeleteCustomersRequest, DeleteEstimatesRequest, DeleteExpensesRequest, DeleteInvoiceRequest, DeleteItemsRequest, DeletePaymentsRequest, and DeleteUserRequest validators check that identifiers exist but do not consistently check tenant ownership. An authenticated user can submit another company's identifier and delete cross-company records. This vulnerability is fixed in 2.4.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00433 37th percentileScored 2026-11-07

Fix Fixed InvoiceShelf (InvoiceShelf): 2.4.0

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 2.4.0	2.4.0	Patch available	CNA

InvoiceShelf VendorInvoiceShelf Affected before 2.4.0 Fixed in 2.4.0 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:invoiceshelf:invoiceshelf::::::::	—	—	InvoiceShelf

cpe:2.3:a:invoiceshelf:invoiceshelf:*:*:*:*:*:*:*:* Versions — — ·InvoiceShelf

Remediation

Upgrade InvoiceShelf to version 2.4.0, which fixes this flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Fix · CNA InvoiceShelf (InvoiceShelf) Fixed in 2.4.0

Timeline

2026-10-15 Threatist record created from CVE-2026-55387
2026-10-16 CISA SSVC decision points changed
2026-10-16 Priority changed: MEDIUM → HIGH

References

Other 4

TI-2026-74459 InvoiceShelf: Public EmailLog token type confusion allows cross-company invoice disclosure CVSS 3.1HIGH 8.2
TI-2026-26653 InvoiceShelf: SSRF in Invoice PDF Rendering via Unsanitised HTML in Notes Field CVSS 3.1HIGH 8.7
TI-2026-26652 InvoiceShelf: SSRF in Payment Receipt PDF Rendering via Unsanitised HTML in Notes Field CVSS 3.1HIGH 8.1
TI-2026-26651 InvoiceShelf: SSRF in Estimate PDF Rendering via Unsanitised HTML in Notes Field CVSS 3.1HIGH 8.1
TI-2026-74462 SQL injection in InvoiceShelf ORDER BY clause exposes database data CVSS 4.0HIGH 7.1
TI-2026-74457 Missing access check in InvoiceShelf estimate conversion CVSS 3.1HIGH 7.1

See all 10 →

Sources

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