CVE-2026-17852
Summary
by MITRE • 07/30/2026
Inappropriate implementation in Media Router in Google Chrome prior to 151.0.7922.72 allowed a remote attacker to bypass same origin policy via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 07/30/2026
The vulnerability under discussion represents a critical flaw in Google Chrome's Media Router implementation that existed prior to version 151.0.7922.72, constituting a medium severity issue according to Chromium's security classification. This weakness stems from an inappropriate implementation pattern within the browser's media routing subsystem that governs how Chrome handles multimedia content delivery across different devices and networks. The flaw specifically enables remote attackers to circumvent the fundamental same origin policy that serves as a cornerstone of web security architecture, potentially allowing unauthorized access to sensitive media resources.
The technical nature of this vulnerability lies in the improper handling of cross-origin media requests within Chrome's Media Router component, which is responsible for managing how audio and video content flows between different origins. When a crafted HTML page is loaded, the vulnerable implementation fails to properly enforce origin-based restrictions that normally prevent one domain from accessing resources belonging to another domain. This misconfiguration creates an exploitable pathway where malicious actors can construct specially formatted web pages that manipulate the media router's behavior to bypass these essential security boundaries.
The operational impact of this vulnerability extends beyond simple privilege escalation, as it fundamentally undermines the browser's ability to maintain secure isolation between different web origins. Attackers could potentially leverage this flaw to access media content from other domains without proper authorization, including sensitive streaming data, private video feeds, or protected audio resources that should remain isolated within their designated origin boundaries. The same origin policy violation creates a potential vector for data exfiltration, content manipulation, or further exploitation of other security weaknesses within the browser environment.
This vulnerability aligns with CWE-284, which addresses inadequate access control mechanisms in software systems, and demonstrates how improper implementation of security controls can create exploitable conditions. The flaw also intersects with ATT&CK technique T1059, specifically covering user execution of malicious code through web-based attacks that leverage browser vulnerabilities to gain unauthorized access to system resources. Organizations should implement immediate mitigations including mandatory browser updates to version 151.0.7922.72 or later, along with network monitoring for suspicious media-related traffic patterns and enhanced web application firewalls to detect potential exploitation attempts.
Security teams must prioritize this vulnerability due to its medium severity classification and the potential for remote code execution through advanced attack vectors that could build upon this initial bypass. The remediation process requires comprehensive browser patching across all affected systems while maintaining awareness of similar implementation flaws in other media handling components within the browser ecosystem. Additional protective measures should include user education about avoiding untrusted web content and implementing strict content security policies that further limit media resource access even when such vulnerabilities exist in the underlying browser infrastructure.