Auth bypass in Invoiceshelf
CVE-2026-55383
InvoiceShelf is an open-source web & mobile app that helps track expenses, payments and create professional invoices and estimates. Prior to version 2.4.0, InvoiceShelf public customer invoice, estimate, and payment routes use an EmailLog token's numeric mailable_id without verifying mailable_type, and the JSON handlers do not enforce EmailLog::isExpired. A token issued for one document type can therefore disclose a different company's document when numeric identifiers collide, and an expired token can remain usable on the JSON routes GET /customer/invoices/{email_log:token}, GET /customer/estimates/{email_log:token}, and GET /customer/payments/{email_log:token}. View handlers can also mark a mismatched invoice or estimate as viewed and send a notification. This issue is fixed in version 2.4.0.
Published .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Invoiceshelf — versions < 2.4.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-55383?
- CVE-2026-55383 is a high-severity vulnerability in Invoiceshelf, classified under Improper Authorization. CVSS score: 8.2/10. Published 2026-10-14.
- How severe is CVE-2026-55383?
- High severity. CVSS v3 base score is 8.2 out of 10.