CVE-2026-119431 in Workspace
Summary
by MITRE • 11/06/2026
A server-side request forgery (SSRF) vulnerability exists in Foxit Workspace's file-upload functionality. Insufficient validation of user-supplied links may allow a remote attacker to induce the server to access internal resources and return their contents, potentially resulting in sensitive information disclosure and unauthorized access to internal services.
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Analysis
by VulDB Data Team • 11/06/2026
The identified security flaw resides within the file-upload mechanism of Foxit Workspace, manifesting as a Server-Side Request Forgery vulnerability. This type of attack exploits the trust that an application places in its own server capabilities by forcing it to make HTTP requests to arbitrary destinations controlled or influenced by the user. In this specific instance, the root cause is insufficient validation and sanitization of user-supplied URLs provided during the file upload process. When a remote attacker submits a maliciously crafted link pointing to internal network resources rather than external public files, the server processes this input without adequate checks on the destination address or protocol scheme. This lack of rigorous input verification allows the application to act as an intermediary proxy for unauthorized requests, effectively bypassing standard perimeter security controls that typically restrict direct access from outside networks to sensitive internal infrastructure.
The operational impact of this vulnerability is significant, primarily centering on information disclosure and potential lateral movement within a network environment. By inducing the server to fetch content from internal resources, an attacker can retrieve data that should remain confidential, such as configuration files, database credentials stored in accessible endpoints, or proprietary documents hosted on internal servers. Furthermore, because many internal services do not require authentication for certain administrative functions or rely solely on IP-based access controls which are easily spoofed via SSRF, this flaw can lead to unauthorized access to critical internal services. Attackers may use this capability to probe the internal network topology, identify running services, and potentially exploit other vulnerabilities present in those backend systems, thereby escalating their privileges from a low-level web application user to an insider threat with broad visibility into the organization's digital assets.
From a classification perspective, this vulnerability aligns directly with CWE-918, which defines Server-Side Request Forgery (SSRF) flaws where a web server makes requests on behalf of users without proper validation. The attack vector is categorized under ATT&CK technique T1557, specifically Adversary-in-the-Middle or Lateral Tool Transfer scenarios where the compromised application serves as a pivot point for further network reconnaissance and exploitation. This classification highlights the severity of allowing untrusted input to dictate server-side networking behavior, as it undermines the fundamental security boundary between external users and internal systems. The lack of strict allow-listing for permitted domains or protocols is a common misconfiguration that facilitates such exploits, emphasizing the need for robust validation logic in any component handling user-provided URLs.
To mitigate this vulnerability, immediate remediation efforts should focus on implementing rigorous input validation strategies within the file-upload functionality. Developers must enforce an allow-list approach rather than relying on block lists, ensuring that only specific, trusted domains and protocols are permitted during URL processing. It is critical to validate not just the format of the URL but also resolve the hostname to its IP address before making the request, then verify that the resulting IP does not fall within private or reserved ranges such as RFC 1918 addresses, loopback interfaces, or link-local scopes. Additionally, implementing network-level controls like firewall rules can provide a secondary layer of defense by restricting outbound connections from the application server to only those destinations strictly necessary for business operations. Regular security testing and code reviews should be conducted to ensure that similar validation gaps do not exist in other parts of the application architecture, thereby maintaining a strong posture against SSRF-based attacks.