CVE-2026-55387
HIGH 7.2InvoiceShelf 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.
Severe if exploited (CVSS 7.2), but no known exploitation and low modeled probability. Patch on a normal cadence.
Exploitation likelihood
0.4%chance of exploitation in 30 days · 37th percentile
Impact if exploited
7.2CVSS 4.0 · HIGH
- ConfidentialityNone
- IntegrityHigh
- AvailabilityHigh
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ⚠Privileges: Requires a low-privilege account
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
- ✓Requirements: No special attack requirements
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Data snapshot:
Weakness (CWE)
- CWE-284: : Improper Access Control
- CWE-639: : Authorization Bypass Through User-Controlled Key
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
References and research data (JSON)
All CVSS metrics
- HIGH 7.2 v4.0 · CNA Primary
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N - HIGH 7.2 v4.0 · NVD Secondary
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
References
Exploit-tagged references (not proof of a PoC)
- https://github.com/InvoiceShelf/InvoiceShelf/security/advisories/GHSA-wxrv-73x6-8r62 CVE record · GitHub_M · Updated 2026-10-14T19:21:49.520Z
CVE record · CISA-ADP · Updated 2026-10-15T15:56:54.563Z
NVD · CVE-2026-55387 · Updated 2026-10-15T21:08:49.703
Advisories
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-101609 EUVD · EUVD-2026-101609
Technical & other
- https://github.com/InvoiceShelf/InvoiceShelf/pull/661 CVE record · GitHub_M · Updated 2026-10-14T19:21:49.520Z
NVD · CVE-2026-55387 · Updated 2026-10-15T21:08:49.703 - https://github.com/InvoiceShelf/InvoiceShelf/commit/e432e4e62f5aa52238e3ff3fc37a0c78588eec47 CVE record · GitHub_M · Updated 2026-10-14T19:21:49.520Z
NVD · CVE-2026-55387 · Updated 2026-10-15T21:08:49.703 - https://github.com/InvoiceShelf/InvoiceShelf/releases/tag/2.4.0 CVE record · GitHub_M · Updated 2026-10-14T19:21:49.520Z
NVD · CVE-2026-55387 · Updated 2026-10-15T21:08:49.703