CVE-2026-43918 - Suspended or inactive FOSSBilling accounts can retain or regain access through existing sessions, API t

[Starburst-David]

CVE ID: CVE-2026-43918
Published: July 6, 2026
Description: FOSSBilling is a free, open-source billing and client management system. Prior to version 0.8.0, when a client or staff/admin account is suspended or marked inactive, existing authenticated sessions are not invalidated. The session identity loaders in src/di.php (loggedin_client and loggedin_admin) only reject sessions if the backing account record no longer exists in the database. They do not verify that the account's status is still active. This allows a suspended or deactivated user to retain full access until their session naturally expires. This issue has been fixed in version 0.8.0.
Severity: 8.7 | HIGH

More Information:
https://cvefeed.io/vuln/detail/CVE-2026-43918