CVE-2026-27422 in YT Player Plugin
Summary
by MITRE • 07/23/2026
Unauthenticated Broken Access Control in YT Player <= 2.0.9 versions.
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Analysis
by VulDB Data Team • 07/23/2026
This vulnerability represents a critical broken access control flaw that affects the YouTube Player component version 2.0.9 and earlier. The issue stems from insufficient authentication checks within the player's access control mechanisms, allowing unauthorized users to bypass normal security boundaries and gain access to restricted content or functionality. The vulnerability manifests when the player fails to properly validate user credentials or session tokens before granting access to protected media resources or administrative features.
The technical implementation of this flaw typically involves the absence of proper authorization checks in API endpoints or internal methods that handle media playback requests. Attackers can exploit this weakness by crafting malicious requests that bypass authentication layers, potentially gaining access to private videos, restricted playlists, or administrative controls within the player interface. This represents a classic violation of the principle of least privilege as outlined in the CWE-284 access control vulnerability classification. The flaw may also enable attackers to manipulate playback parameters, access metadata, or trigger unauthorized actions through the player's API interfaces.
The operational impact of this vulnerability extends beyond simple content theft, as it can facilitate more sophisticated attacks including data exfiltration, media manipulation, and potential lateral movement within affected systems. Organizations using vulnerable versions of the YouTube Player component face significant risks to their digital assets and user privacy. The vulnerability may also enable attackers to perform unauthorized administrative actions or access sensitive configuration parameters that could be leveraged for further exploitation. This type of weakness often maps to ATT&CK technique T1078 legitimate credentials, where attackers can leverage compromised player functionality to maintain persistence within target environments.
Security mitigation strategies should include immediate upgrade to the patched version of the YouTube Player component, implementation of robust authentication checks at all access points, and deployment of network monitoring controls to detect anomalous access patterns. Organizations must also ensure proper input validation and authorization enforcement throughout the application stack, implementing principle of least privilege controls for all player functionalities. Regular security assessments and penetration testing should verify that access control mechanisms remain properly enforced after remediation efforts have been implemented. The vulnerability demonstrates the critical importance of maintaining up-to-date software components and the potential consequences of neglecting security patches in media playback systems.