TI-2026-40143 Aliases CVE-2026-55610

InvoiceShelf has cross-company user read/update IDOR that enables cross-tenant account takeover

MEDIUM 40CWE-639Published 2026-09-23 · Updated 2026-09-23

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.

Summary

InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and create professional invoices and estimates. Prior to version 2.4.1, in InvoiceShelf's multi-company installations, any user who is an Owner of one company can read and overwrite any user account in any other company on the same installation. `GET/PUT /api/v1/users/{user}` resolves the target `User` by global primary key, and `UserPolicy` checks only that the requester owns their own header-company — it never verifies that the target user belongs to that company. This allows cross-tenant disclosure of user data and full account takeover (email/password overwrite + company re-assignment). Version 2.4.1 fixes the issue.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00428 37th percentileScored 2026-11-07

Fix Fixed InvoiceShelf (InvoiceShelf): 2.4.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

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 2.4.1	2.4.1	Patch available	CNA

InvoiceShelf VendorInvoiceShelf Affected before 2.4.1 Fixed in 2.4.1 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

Fix · CNA InvoiceShelf (InvoiceShelf) Fixed in 2.4.1

Timeline

2026-10-02 Threatist record created from CVE-2026-55610
2026-10-25 Priority changed: LOW → MEDIUM

References

Other 1

https://github.com/InvoiceShelf/InvoiceShelf/security/advisories/GHSA-vgx6-6cqr-m8qr

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-2026-74463 InvoiceShelf bulk deletion lets users delete other companies' records CVSS 4.0HIGH 7.2
TI-2026-74462 SQL injection in InvoiceShelf ORDER BY clause exposes database data CVSS 4.0HIGH 7.1

See all 10 →

Sources

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