CVE-2026-17706 in Chrome
Summary
by MITRE • 07/30/2026
Insufficient validation of untrusted input in Media in Google Chrome on Windows prior to 151.0.7922.72 allowed a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page. (Chromium security severity: High)
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Analysis
by VulDB Data Team • 07/30/2026
This vulnerability represents a critical cross-origin data leakage issue within Google Chrome's media handling component on Windows systems prior to version 151.0.7922.72. The flaw stems from inadequate validation of untrusted input within the browser's media processing pipeline, specifically affecting how Chrome handles crafted HTML content that triggers media-related operations. The vulnerability operates under CWE-20 which categorizes it as a weakness involving insufficient input validation, and aligns with ATT&CK technique T1557 for credential access through network sniffing and data exfiltration.
The technical exploitation occurs when a remote attacker who has already compromised the renderer process injects malicious HTML content that manipulates media elements to access cross-origin resources. This requires the attacker to first gain initial access through another vulnerability or attack vector, as the exploit itself operates within the context of an already compromised browser process. The flaw enables unauthorized data access across domain boundaries by bypassing standard security restrictions that should prevent one origin from accessing resources belonging to another origin.
The operational impact of this vulnerability extends beyond simple information disclosure, as it represents a significant escalation path for attackers who have already achieved initial compromise. Cross-origin data leakage can expose sensitive user information including personal data, session tokens, and other confidential resources that applications may access through media elements. This vulnerability particularly affects users who browse untrusted websites or encounter malicious advertisements that trigger the exploited media processing code paths.
Security mitigations should focus on immediate patch deployment to version 151.0.7922.72 or later, as this update addresses the core input validation issues within Chrome's media handling component. Organizations should also implement network monitoring to detect potential exploitation attempts and consider browser hardening measures including strict content security policies and sandboxing configurations. The vulnerability underscores the importance of robust input validation in all browser components and highlights the critical nature of maintaining up-to-date browser security patches to prevent exploitation of known vulnerabilities that could lead to significant data breaches and privacy violations.