CVE-2026-22576: FortiSOAR Information Disclosure Flaw

CVE-2026-22576 Overview

A storing passwords in a recoverable format vulnerability (CWE-257) has been identified in Fortinet FortiSOAR affecting both PaaS and on-premise deployments. This vulnerability allows an authenticated remote attacker to retrieve passwords for multiple installed connectors by modifying the server address in connector configuration. The flaw stems from improper credential storage practices that enable password recovery by unauthorized parties with valid authentication credentials.

Critical Impact

Authenticated attackers can exfiltrate connector credentials, potentially compromising integrated security tools and expanding attack surface across the organization's security infrastructure.

Affected Products

• FortiSOAR PaaS 7.6.0 through 7.6.4
• FortiSOAR PaaS 7.5.0 through 7.5.2
• FortiSOAR PaaS 7.4 all versions
• FortiSOAR PaaS 7.3 all versions
• FortiSOAR on-premise 7.6.0 through 7.6.4
• FortiSOAR on-premise 7.5.0 through 7.5.2
• FortiSOAR on-premise 7.4 all versions
• FortiSOAR on-premise 7.3 all versions

Discovery Timeline

• April 14, 2026 - CVE-2026-22576 published to NVD
• April 14, 2026 - Last updated in NVD database

Technical Details for CVE-2026-22576

Vulnerability Analysis

This vulnerability falls under CWE-257 (Storing Passwords in a Recoverable Format), a cryptographic weakness that occurs when applications store credentials in a manner that allows them to be retrieved in plaintext or easily reversible form. In FortiSOAR, the flaw exists within the connector configuration handling mechanism, where stored credentials for integrated connectors can be extracted by manipulating the server address field.

FortiSOAR serves as a Security Orchestration, Automation, and Response (SOAR) platform that integrates with numerous security tools via connectors. These connectors typically require authentication credentials to communicate with external services such as SIEM platforms, threat intelligence feeds, ticketing systems, and other security infrastructure components. The insecure storage of these credentials creates a significant risk of credential theft.

The vulnerability requires network access and authenticated user privileges to exploit. An attacker with valid FortiSOAR credentials can modify connector configurations to redirect authentication attempts to an attacker-controlled server, thereby capturing the stored passwords when the connector attempts to authenticate.

Root Cause

The root cause of this vulnerability lies in FortiSOAR's credential storage mechanism for connector configurations. Instead of utilizing one-way hashing or properly secured encryption with key isolation, the system stores passwords in a format that permits recovery. When combined with the ability to modify connector server addresses, this creates an attack vector where credentials can be redirected to malicious endpoints and captured in transit.

Attack Vector

The attack leverages the network-accessible connector configuration interface. An authenticated attacker with sufficient privileges to modify connector settings can execute the following attack flow:

1. Access the FortiSOAR connector configuration interface
2. Identify target connectors with stored credentials
3. Modify the server address field to point to an attacker-controlled endpoint
4. Trigger a connection attempt or wait for scheduled connector activity
5. Capture authentication credentials as the connector attempts to authenticate against the malicious server
6. Restore original server address to avoid detection

This attack technique enables credential harvesting without directly accessing the credential storage, instead exploiting the application's ability to transmit stored credentials to arbitrary endpoints.

Detection Methods for CVE-2026-22576

Indicators of Compromise

• Unexpected modifications to connector server addresses or endpoint configurations in FortiSOAR
• Outbound connection attempts from FortiSOAR to unknown or suspicious IP addresses
• Configuration change audit logs showing unauthorized connector modifications
• Multiple connector authentication failures following configuration changes

Detection Strategies

• Enable and monitor FortiSOAR audit logs for connector configuration modifications
• Implement network monitoring to detect connections from FortiSOAR to unexpected destinations
• Configure alerts for changes to connector server address fields
• Deploy SentinelOne to monitor for suspicious process behavior and network anomalies on FortiSOAR hosts

Monitoring Recommendations

• Review connector configuration change history regularly for unauthorized modifications
• Implement network segmentation to restrict FortiSOAR outbound connections to known legitimate endpoints
• Monitor authentication logs on integrated systems for anomalous login attempts following connector modifications

How to Mitigate CVE-2026-22576

Immediate Actions Required

• Review all connector configurations for unauthorized server address modifications
• Audit user access permissions and remove unnecessary administrative privileges
• Rotate credentials for all connectors potentially affected by this vulnerability
• Implement network controls to restrict FortiSOAR connector communication to allowlisted endpoints

Patch Information

Fortinet has released security guidance for this vulnerability. Organizations should consult the Fortinet Security Advisory FG-IR-26-104 for specific remediation instructions and updated software versions. Upgrade to the latest patched version of FortiSOAR as recommended by Fortinet.

Workarounds

• Implement strict role-based access control to limit connector configuration modifications to trusted administrators only
• Deploy network monitoring and alerting for FortiSOAR outbound connections to detect suspicious endpoint changes
• Enable comprehensive audit logging for all configuration changes within FortiSOAR
• Consider implementing network-level controls to restrict FortiSOAR connector traffic to pre-approved destinations only

# Example: Network monitoring for suspicious FortiSOAR connections
# Monitor outbound connections from FortiSOAR host to detect unusual destinations
tcpdump -i eth0 host <fortisoar-ip> and not net <trusted-network-range> -w fortisoar_suspicious.pcap