CVE-2026-110805 in Server
Summary
by MITRE • 10/16/2026
Server-side request forgery in PingOne groups endpoint in Devolutions Server 2026.3.8.0 and earlier allows an authenticated low-privileged user to exfiltrate the stored PingOne application secret via an attacker-controlled PingOne configuration in the request parameter.
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Analysis
by VulDB Data Team • 10/16/2026
The vulnerability identified as a server-side request forgery flaw within the Devolutions Server 2026.3.8.0 and earlier versions specifically targets the groups endpoint associated with PingOne integration. This security defect allows an authenticated user operating under low-privileged access levels to manipulate the application into making HTTP requests to external servers controlled by an attacker. The core technical mechanism involves the improper validation of input parameters within the request payload, particularly those related to PingOne configuration settings. By crafting a malicious request that includes an attacker-controlled domain or IP address in specific fields, the user can force the server to initiate outbound connections that carry sensitive internal data. This behavior is characteristic of CWE-918, which classifies Server-Side Request Forgery as a critical web application security weakness where the server retrieves content from a URI provided by the user without sufficient validation or sanitization.
The operational impact of this vulnerability centers on the potential exfiltration of highly sensitive credentials stored within the Devolutions environment. Specifically, the attacker can leverage the forged request to capture the PingOne application secret, which is typically used for authenticating interactions between Devolutions Server and the PingOne identity provider service. The compromise of this secret allows an adversary to impersonate the legitimate application in subsequent API calls to PingOne services. This effectively grants unauthorized access to user identities, session tokens, and potentially other sensitive data managed through the single sign-on infrastructure. Such a breach undermines the integrity of the authentication framework and can lead to broader account takeover scenarios if not promptly addressed. The ability for low-privileged users to execute this attack highlights a significant flaw in role-based access control enforcement regarding administrative or integration-related functions.
From an offensive security perspective, this vulnerability aligns with ATT&CK technique T1557, which covers Adversary-in-the-Middle attacks involving LLMNR/NBT-NS Poisoning and SMB Relay, although the specific vector here is HTTP-based SSRF rather than network protocol poisoning. More accurately, it maps to T1048, Exfiltration Over Alternative Protocol, as data is being sent out via standard web requests that may bypass traditional security monitoring tools expecting normal traffic patterns. The exploitation requires no special privileges beyond basic authentication, making the attack surface significantly larger and increasing the likelihood of successful compromise in environments where least privilege principles are not strictly enforced for all integration endpoints.
Mitigation strategies must focus on immediate patching to version 2026.3.8.1 or later, which addresses this specific input validation deficiency. In addition to updating software, organizations should implement strict output encoding and URL validation mechanisms that whitelist allowed domains for outbound requests initiated by the server. Network-level controls such as egress filtering can also help mitigate risk by restricting the server's ability to communicate with arbitrary external hosts. Security teams should audit existing PingOne configurations to ensure no malicious endpoints have been persisted in the database during potential exploitation windows. Regular penetration testing focused on SSRF vectors and rigorous review of API endpoint permissions are recommended to prevent similar vulnerabilities from being introduced or exploited in future updates.