CVE-2026-62418 in Syncope
Summary
by MITRE • 07/20/2026
Low-privileged authenticated Server-Side Request Forgery (SSRF) vulnerability in Apache Syncope via Connectors and Resources check.
This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1.
Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue.
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Analysis
by VulDB Data Team • 07/20/2026
Apache Syncope contains a server-side request forgery vulnerability that allows low-privileged authenticated users to make unauthorized requests to internal systems through the connector and resource check functionality. This vulnerability exists in multiple version ranges including 3.0.0-M0 through 3.0.16, 4.0.0-M0 through 4.0.6, and 4.1.0-M0 through 4.1.1, representing a critical security risk for organizations relying on this identity management platform. The flaw specifically manifests when the system processes user-supplied input during connector and resource validation checks, where external URLs or network addresses are not properly validated or sanitized before being processed.
The technical implementation of this vulnerability stems from insufficient input validation within the connector and resource check mechanisms. When authenticated users with minimal privileges attempt to validate connectors or resources through the administrative interface, the system accepts user-provided URLs without adequate sanitization or restriction. This creates an environment where malicious actors can craft specially formatted requests that bypass normal network boundaries and potentially access internal services that should remain isolated from external networks. The vulnerability aligns with CWE-918 which specifically addresses server-side request forgery issues where applications fail to properly validate external resource references, and it maps to ATT&CK technique T1071.004 for application layer protocol tunneling through improper validation of network requests.
The operational impact of this vulnerability extends beyond simple privilege escalation as it enables attackers to perform reconnaissance on internal network infrastructure, potentially accessing sensitive backend services, databases, or other internal systems that are not directly exposed to external networks. An attacker could leverage this vulnerability to map internal network topology, identify running services, or even attempt to exploit other vulnerabilities within the internal environment. The low privilege requirement means that even users with basic access rights can potentially compromise the security posture of the entire system, making this particularly dangerous in environments where multiple user roles exist.
Organizations should immediately upgrade to version 4.0.7 or 4.1.2 to remediate this vulnerability as these releases contain proper input validation controls and sanitization measures that prevent unauthorized external requests from being processed through the connector and resource check functionality. Additional mitigations include implementing network segmentation to isolate critical internal services, configuring firewall rules to restrict outbound connections from the Syncope server, and monitoring for unusual patterns in connector and resource validation activities. The fix implemented in the patched versions addresses the root cause by ensuring that all external URLs are properly validated against a whitelist of allowed domains or by implementing strict input sanitization that prevents malicious URL schemes from being processed within the system.
This vulnerability demonstrates the importance of validating all user-supplied inputs, particularly when dealing with network resource references and external connectivity features. The attack surface expands significantly when systems allow authenticated users to test connections to arbitrary external resources without proper restrictions, creating potential pathways for internal network compromise. Security teams should conduct comprehensive assessments of their Syncope installations to ensure proper patching and implementation of additional security controls to prevent similar vulnerabilities in other components of their identity management infrastructure.