CVE-2026-103104 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 in the media implementation which allows a remote attacker to trigger a software abort resulting in a denial of service.
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Analysis
by VulDB Data Team • 09/30/2026
The vulnerability identified affects Pexip Infinity versions prior to 38.2 as well as specific releases within the 39 and 40 series, specifically versions 39.0, 39.1, and 40.0. This security flaw resides within the media implementation layer of the software architecture, which is responsible for handling real-time audio and video data streams essential for conferencing operations. The core technical deficiency involves improper input validation mechanisms that fail to adequately sanitize or verify incoming media packets before processing them. When a remote attacker crafts maliciously formatted media streams containing invalid or unexpected data structures, the application fails to handle these anomalies gracefully. Instead of rejecting the malformed input and continuing normal operation, the software encounters an unrecoverable error state during parsing or decoding routines.
This failure in validation logic directly leads to a software abort condition within the affected process. A software abort typically results in the immediate termination of the running service thread or daemon responsible for media handling. In the context of Pexip Infinity, which serves as a critical infrastructure component for enterprise video conferencing and unified communications, such an abrupt termination disrupts active sessions and prevents new connections from being established via the affected components. The operational impact is characterized by a denial of service where legitimate users experience dropped calls, frozen screens, or complete inability to join meetings depending on which specific media server node is impacted. Because this vulnerability can be triggered remotely without requiring authentication in many deployment scenarios, it presents a significant risk to availability and business continuity for organizations relying on these platforms for daily operations.
From a classification perspective, this issue aligns with Common Weakness Enumeration identifier CWE-20 Improper Input Validation, as the root cause is the failure to verify that user-supplied input meets expected criteria before processing. Furthermore, in terms of tactical behavior within an attack lifecycle, this vulnerability facilitates actions consistent with ATT&CK technique T1499 Endpoint Denial of Service, where adversaries aim to exhaust or degrade system resources and availability by exploiting software flaws rather than overwhelming them through volume alone. The ability to trigger a crash via crafted network traffic allows for efficient resource consumption without the need for complex exploitation chains or privilege escalation steps initially.
Mitigation strategies must prioritize immediate patching to the latest stable release of Pexip Infinity, which addresses these validation gaps in the media implementation layer. Organizations should verify their current version against the vendor's security advisory and apply updates during scheduled maintenance windows to minimize disruption. In environments where immediate patching is not feasible due to operational constraints, network-level controls such as deep packet inspection firewalls or intrusion prevention systems may be configured to detect and block malformed RTP or RTCP packets that exhibit patterns associated with this exploit vector. Additionally, implementing strict rate limiting on media ingress points can help mitigate the impact of repeated exploitation attempts by reducing the likelihood of triggering the abort condition through high-frequency malicious traffic. Regular security assessments focused on input validation practices across all real-time communication components are recommended to prevent similar vulnerabilities from persisting in future software updates.