CVE-2026-17702 in Chrome
Summary
by MITRE • 07/30/2026
Inappropriate implementation in Skia in Google Chrome 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 the Skia graphics rendering engine used by Google Chrome. The flaw existed in versions prior to 151.0.7922.72 and specifically targeted the renderer process, which is responsible for displaying web content and handling graphics operations. The vulnerability stems from an inadequate implementation of security boundaries within the graphics subsystem, allowing malicious actors who have already compromised the renderer process to extract sensitive data from different origins. This represents a significant escalation of privilege scenario where the attacker's initial foothold in the renderer process can be leveraged to access cross-origin information that should normally be isolated and protected.
The technical implementation flaw resides in how Skia handles graphics operations and memory management when processing crafted HTML content. When a renderer process is compromised, the attacker can manipulate the graphics pipeline to perform unauthorized data access patterns that bypass normal security mechanisms. This type of vulnerability typically involves improper validation of graphics commands or memory access controls that should prevent cross-origin data exposure. The issue falls under CWE-200, which covers "Information Exposure," and more specifically relates to improper access control within graphics rendering contexts. The Chromium security team classified this as High severity because it enables attackers to bypass the same-origin policy that is fundamental to web security architecture.
The operational impact of this vulnerability extends beyond simple information leakage, as it can enable sophisticated attacks such as cross-site scripting data exfiltration, credential harvesting, or sensitive information disclosure from other domains. Attackers could potentially use this vulnerability to access user sessions, personal data, or corporate information that should be isolated between different origins. The attack vector requires an initial compromise of the renderer process, which can occur through various means such as exploiting other vulnerabilities in Chrome's sandboxing mechanisms or through social engineering attacks that lead users to visit malicious websites. This vulnerability creates a dangerous scenario where attackers who gain limited access to the browser's rendering subsystem can expand their capabilities significantly.
Mitigation strategies should focus on immediate patching of affected Chrome versions to 151.0.7922.72 or later, which contains the necessary fixes for the Skia graphics implementation. Organizations should also implement additional security measures such as enhanced monitoring of renderer process behavior, network traffic analysis for unusual data exfiltration patterns, and regular security assessments of web applications that may be vulnerable to such attacks. The remediation aligns with ATT&CK technique T1059.007 for execution through web shells and T1566 for initial access via malicious websites. Browser vendors should ensure comprehensive testing of graphics rendering components, particularly focusing on memory isolation and access control mechanisms that prevent cross-origin information leakage in compromised processes. Network security teams should monitor for unusual outbound connections or data patterns that might indicate exploitation attempts.