CVE-2026-103099 in Infinity
Summary
by MITRE • 09/30/2026
Pexip Infinity before 41.1 is affected by improper input validation in the media implementation that 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 in Pexip Infinity versions prior to release 41.1 represents a critical flaw within the platform's core media processing subsystem, specifically stemming from inadequate input validation mechanisms. As an enterprise-grade video conferencing and unified communications solution, Pexip Infinity handles high volumes of real-time audio and video streams, requiring robust parsing logic for various codecs and signaling protocols. The defect arises when the application fails to properly sanitize or verify specific parameters within incoming media packets before they are processed by the underlying engine. This lack of rigorous validation allows a remote attacker to craft maliciously formatted data that violates expected internal constraints, thereby triggering an unhandled exception condition that forces the software to abort execution abruptly.
From a technical perspective, this flaw is classified under CWE-20 as Improper Input Validation and aligns with MITRE ATT&CK technique T1499, Endpoint Denial of Service. The attack vector does not require authentication or prior access privileges, making it remotely exploitable over standard network interfaces used for SIP signaling or media transport protocols such as RTP or RTCP. When the malformed input reaches the vulnerable code path, the application's error handling routines are bypassed due to the severity of the internal state corruption caused by the invalid data. Instead of gracefully rejecting the packet and logging an error, the system encounters a fatal condition that necessitates an immediate termination of the process to prevent further instability or potential memory corruption exploitation.
The operational impact of this vulnerability is significant for organizations relying on Pexip Infinity for mission-critical communications. A successful exploit results in a complete denial of service by causing the media server processes to crash repeatedly. This leads to intermittent connectivity issues, dropped calls, and an inability for users to join or maintain video conferences. In environments where high availability is paramount, such as healthcare facilities conducting remote patient consultations or corporate headquarters managing global meetings, these disruptions can cause substantial productivity losses and reputational damage. Furthermore, the instability caused by repeated crashes may mask other underlying system issues, complicating troubleshooting efforts during an active incident response scenario.
Mitigation strategies must prioritize immediate patching to version 41.1 or later, where this input validation logic has been corrected to properly reject malformed media streams without triggering a fatal abort. In scenarios where immediate patching is not feasible due to operational constraints, network-level controls should be implemented as compensating measures. This includes configuring firewalls and intrusion prevention systems to inspect SIP and RTP traffic for anomalies indicative of the exploit pattern, such as unusually large packet sizes or invalid header fields associated with the specific codec vulnerabilities exploited by this flaw. Additionally, enabling strict logging on media servers can aid in detecting attempted exploitation activities, allowing security teams to monitor for patterns consistent with denial-of-service attacks targeting the application layer.