CVE-2026-70467 in FortiSIEM
Summary
by MITRE • 08/12/2026
A server-side request forgery (ssrf) vulnerability in Fortinet FortiSIEM 7.5.0, FortiSIEM 7.4.0 through 7.4.2, FortiSIEM 7.3.0 through 7.3.5, FortiSIEM 7.2 all versions, FortiSIEM 7.1 all versions, FortiSIEM 7.0 all versions, FortiSIEM 6.7 all versions, FortiSIEM 6.6 all versions, FortiSIEM 6.5 all versions may allow attacker to execute unauthorized code or commands via <insert attack vector here>
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Analysis
by VulDB Data Team • 08/12/2026
A server-side request forgery vulnerability in Fortinet FortiSIEM affects multiple versions spanning from 6.5 through 7.5, creating a critical security risk that allows remote attackers to manipulate the system's ability to make HTTP requests to arbitrary destinations. This flaw exists within the application's handling of user-supplied input that is subsequently used to construct server-side requests without proper validation or sanitization. The vulnerability stems from insufficient restrictions on the target URLs or endpoints that the system processes, enabling malicious actors to redirect requests through the vulnerable FortiSIEM instance to internal network resources or external systems controlled by the attacker. This represents a classic ssrf weakness categorized under CWE-918, which specifically addresses server-side request forgery vulnerabilities where attackers can manipulate the target of HTTP requests initiated by the server.
The operational impact of this vulnerability extends beyond simple data exfiltration or service disruption, as it creates a potential pathway for full system compromise. An attacker could leverage this weakness to access internal services that are normally isolated from external network traffic, potentially gaining access to databases, administrative interfaces, or other sensitive systems within the network perimeter. The vulnerability's presence across such a wide range of FortiSIEM versions indicates a fundamental flaw in the application's architecture rather than a transient issue, making it particularly concerning for organizations with multiple deployments across different version tiers. The attack surface is further expanded when considering that FortiSIEM serves as a security information and event management platform, meaning successful exploitation could provide attackers with access to critical security monitoring data and potentially enable lateral movement within the network.
The security implications of this vulnerability align with several ATT&CK techniques including T1071.004 Application Layer Protocol DNS and T1566.001 Phishing, as attackers may use the SSRF capability to redirect traffic through compromised FortiSIEM instances to deliver malicious payloads or establish command and control channels. Network infrastructure monitoring systems like FortiSIEM are often considered trusted components within security architectures, making this vulnerability particularly dangerous as it could be exploited to bypass network security controls or hide malicious activities from detection systems. Organizations using affected FortiSIEM versions should immediately implement network segmentation measures to isolate the vulnerable system and monitor for unusual outbound traffic patterns that might indicate exploitation attempts.
Mitigation strategies should include applying the latest security patches provided by Fortinet, implementing strict input validation on all user-facing interfaces, and configuring network access controls to limit the ability of the FortiSIEM instance to make outbound requests to arbitrary destinations. Organizations should also consider deploying web application firewalls or API gateways that can detect and block suspicious request patterns originating from the vulnerable system. The vulnerability's classification as a server-side request forgery aligns with industry standards for identifying and addressing such threats, emphasizing the need for robust validation of all external resource references within enterprise security platforms. Additionally, implementing network monitoring solutions capable of detecting anomalous traffic flows to internal services or unexpected outbound connections can provide early warning of potential exploitation attempts.