CVE-2026-1109 identifies a buffer overflow vulnerability within the rtsp_parse_request function of the cijliu librtsp library, specifically up to the commit 2ec1a81ad65280568a0c7c16420d7c10fde13b04. The vulnerability arises from improper handling of input data during RTSP request parsing, which can lead to memory corruption. Exploitation requires local access with low privileges, meaning an attacker must already have some level of access to the target system. No user interaction is needed, and the attack complexity is low. The vulnerability impacts confidentiality, integrity, and availability but only partially, as indicated by the CVSS vector. The vendor follows a rolling release model, complicating version tracking and patch availability; notably, the vendor has not responded to disclosure efforts, and no patches or mitigations have been published yet. No known exploits are in the wild, reducing immediate risk but not eliminating it. The librtsp library is used in applications that implement the Real Time Streaming Protocol (RTSP), commonly found in media streaming and surveillance systems. The buffer overflow could allow an attacker to execute arbitrary code or cause denial of service locally, potentially escalating privileges or disrupting service.

For European organizations, the impact depends on the deployment of librtsp in their infrastructure, particularly in media streaming, video conferencing, or IP surveillance systems. Successful exploitation could lead to local privilege escalation, unauthorized code execution, or service disruption, affecting system availability and data integrity. Confidentiality could be partially compromised if the attacker accesses sensitive streaming data or system information. Organizations with critical infrastructure relying on RTSP-based systems, such as security monitoring or broadcasting, may face operational disruptions. The lack of vendor response and patches increases the risk of prolonged exposure. Additionally, the requirement for local access limits remote exploitation but raises concerns about insider threats or compromised internal hosts. European entities with strict regulatory requirements for data protection and system integrity must consider this vulnerability seriously to avoid compliance issues and operational risks.

Given the local attack requirement, the primary mitigation is to enforce strict access controls limiting local user privileges and preventing unauthorized local access to systems running librtsp. Implement robust endpoint security measures to detect and prevent lateral movement or privilege escalation attempts. Monitor system logs and network activity for anomalies indicative of exploitation attempts. Employ application whitelisting and sandboxing where possible to contain potential exploits. Since no patches are currently available, consider isolating or segmenting systems using librtsp to reduce exposure. Engage with the vendor or community to track updates or patches and plan for timely application once released. Conduct regular security audits and vulnerability assessments focusing on RTSP-related components. For critical systems, consider alternative libraries or solutions with active maintenance and security support until this vulnerability is resolved.