CVE-2026-103106 in Infinity
Summary
by MITRE • 09/30/2026
Pexip Infinity before 38.2, plus 39.0, 39.1, and 40.0, is affected by improper input validation within an internal Pexip Infinity service that allows an attacker with local access to escalate privileges to root. Exploitation requires an attacker to be able to run arbitrary code on a node by either achieving remote code execution via some other vulnerability or having administrative access to the operating system.
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Analysis
by VulDB Data Team • 09/30/2026
The identified vulnerability in Pexip Infinity versions prior to 38.2, as well as in versions 39.0 through 40.0, represents a critical privilege escalation flaw rooted in improper input validation within an internal service component of the platform. This security deficiency allows an attacker who has already achieved local access on a specific node to escalate their privileges to root level. The core technical issue lies in the failure of the affected service to adequately sanitize or validate inputs provided by lower-privileged processes, thereby enabling the execution of arbitrary commands with elevated permissions that should otherwise be restricted. This type of flaw is characteristic of CWE-20 Improper Input Validation and often facilitates privilege escalation scenarios categorized under CWE-269: Incorrect Privilege Assignment.
The operational impact of this vulnerability is significant for organizations relying on Pexip Infinity for video conferencing infrastructure, as it compromises the integrity of the host operating system. Once an attacker gains root access, they can bypass all security controls implemented at the application layer, including logging mechanisms and audit trails that might rely on standard user-level permissions. This level of control allows for complete compromise of the node, enabling data exfiltration, installation of persistent backdoors, or use of the compromised server as a pivot point to attack other systems within the network. The vulnerability aligns with MITRE ATT&CK technique T1068: Exploitation for Privilege Escalation, specifically illustrating how local access can be leveraged to gain higher-level permissions through flawed service interactions.
It is crucial to note that exploitation of this flaw requires a prerequisite condition where the attacker already possesses the ability to run arbitrary code on the node. This means the vulnerability cannot be exploited remotely in isolation; it necessitates either achieving remote code execution via a separate, distinct vulnerability or obtaining administrative access to the operating system through other means such as credential theft or misconfiguration exploitation. Consequently, this flaw serves primarily as an escalation vector rather than an initial entry point, highlighting the importance of defense-in-depth strategies where multiple layers of security are employed to prevent even partial compromise from leading to total system takeover.
To mitigate this risk, organizations running affected versions must immediately apply the vendor-recommended patches or upgrades to version 38.2 or later, which includes fixes for these input validation errors. In addition to patching, it is advisable to implement strict network segmentation to limit lateral movement and restrict local access privileges wherever possible. Monitoring tools should be configured to detect unusual privilege escalation attempts or unexpected changes in system permissions, providing an additional layer of detection against exploitation activities that may bypass perimeter defenses.