CVE-2026-19160 in Chrome
Summary
by MITRE • 08/07/2026
Uninitialized Use in Skia in Google Chrome prior to 151.0.7922.109 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 • 08/07/2026
This vulnerability represents a critical uninitialized memory access flaw within Skia graphics library that is integrated into Google Chrome browser. The issue specifically affects Chrome versions prior to 151.0.7922.109 and constitutes a high severity threat according to Chromium security assessments. The vulnerability arises from improper initialization of memory variables within the Skia rendering engine, creating potential pathways for information disclosure attacks.
The technical flaw manifests when Skia processes graphics operations that involve uninitialized memory segments, allowing malicious actors to potentially access data that should remain isolated between different origins. This uninitialized use creates a condition where memory locations contain residual data from previous operations or system allocations, which could include sensitive cross-origin information. The vulnerability is particularly dangerous because it requires only compromise of the renderer process, which is an achievable attack vector for remote adversaries.
The operational impact of this vulnerability extends beyond simple information leakage, as it enables sophisticated cross-origin data exfiltration attacks that can undermine web application security boundaries. Attackers who successfully compromise the renderer process can leverage this uninitialized memory access to extract sensitive data from other origins, potentially including cookies, session tokens, or other confidential information stored in memory. This represents a significant bypass of browser security models designed to isolate different web origins and maintain user privacy.
This vulnerability aligns with CWE-457, which catalogs "Use of Uninitialized Variable" as a fundamental software flaw that can lead to unpredictable behavior and security vulnerabilities. The attack pattern corresponds to techniques documented in MITRE ATT&CK framework under T1059 for command and control communications and potentially T1566 for credential access through compromised browser components. The issue demonstrates how graphics rendering libraries can become attack surfaces when proper memory initialization practices are not followed, particularly in complex browser environments where multiple security contexts must be maintained.
The recommended mitigation strategy involves immediate upgrade to Chrome version 151.0.7922.109 or later, which contains the necessary patches addressing the uninitialized memory access issue. Organizations should also implement additional monitoring for suspicious renderer process behavior and consider deploying network-based intrusion detection systems to identify potential exploitation attempts. Browser hardening measures including strict Content Security Policy enforcement and sandboxing configurations can provide additional layers of protection against such vulnerabilities. Regular security assessments of browser components and rendering engines should be conducted to identify similar uninitialized memory access patterns that could potentially lead to information disclosure attacks.