Is CVE-2026-43918 actively exploited?

No active exploitation of CVE-2026-43918 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-43918 be exploited remotely?

Yes. CVE-2026-43918 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-43918?

CVE-2026-43918 has a CVSS score of 8.7 (HIGH).

HOME VULNERABILITIESCVE-2026-43918

HIGH

CVE-2026-43918

CWE-613Published: July 6, 2026· Updated: Jul 7, 2026

8.7

CVSS v3.1

EPSS:0.24%probability of exploitation in 30 daysPercentile:14.4th

Official 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.

NVD Source

Technical Analysis

CVE-2026-43918 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.Low

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/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