🛡️ CVE-2026-43928

⚪ Unknown ✅ No Known Exploit CWE-754 NVD
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

FOSSBilling is a free, open-source billing and client management system. Prior to version 0.8.0, the PayPalEmail payment adapter accepts PayPal IPN callbacks and credits the IPN-supplied amount (mc_gross) to the client's balance without validating it against the invoice total. Combined with a $0.05 floating-point epsilon tolerance in the invoice credit-payment logic, this allows a client to underpay an invoice by up to $0.04 and still have it marked as fully paid. Version 0.8.0 patches the issue. There is no effective workaround without modifying the source code. Merchants using the PayPalEmail adapter should monitor IPN transactions for amounts that do not match their corresponding invoice totals, and manually review and refund suspicious payments.

Affected software

CVE-2026-43928 is recorded against 1 package.

  • unknown

Timeline and source

Published on 6 July 2026 and last revised on 7 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com
github.com

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE CWE-754
Public Exploit ✅ No
Source NVD
Published 2026-07-06
Updated 2026-08-11
Modified 2026-07-07
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown — —

Similar Threats

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