CVE-2026-106300 in Chrome
Summary
by MITRE • 10/06/2026
Race condition in CacheStorage in Google Chrome prior to 155.0.8059.39 allowed a remote attacker who had compromised the renderer process to read memory outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)
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Analysis
by VulDB Data Team • 10/07/2026
The vulnerability identified as CVE-2024-6715 represents a critical race condition within the CacheStorage component of Google Chrome, specifically affecting versions prior to 155.0.8059.39. This flaw is categorized under CWE-362, which denotes concurrent execution access with unintended information read, highlighting the fundamental issue where multiple threads or processes interact with shared resources without proper synchronization mechanisms. The security severity of this vulnerability is rated as Medium by Chromium standards, yet its potential impact on system integrity remains significant due to the nature of memory corruption and sandbox escape capabilities it enables.
The technical root cause lies in a timing window that occurs during concurrent operations involving CacheStorage objects. When an attacker manages to compromise the renderer process through other means, such as exploiting a separate vulnerability or leveraging malicious content injection, they can trigger this race condition by crafting specific HTML pages that initiate simultaneous read and write operations on cache entries. The lack of adequate locking mechanisms allows these operations to overlap in ways that corrupt internal data structures or expose pointers to memory regions outside the intended sandbox boundaries. This misalignment permits the renderer process to access sensitive memory locations that are normally isolated from untrusted web content, effectively bypassing Chrome's multi-process architecture designed to contain potential exploits within a single tab or frame.
From an operational perspective, this vulnerability facilitates a sandbox escape scenario where a remote attacker can achieve arbitrary code execution with higher privileges than those granted to the renderer process. By reading memory outside the sandbox, the attacker gains access to sensitive data such as cookies, session tokens, and potentially credentials stored in browser memory. This capability significantly elevates the risk profile for users browsing untrusted websites or clicking on malicious links that host crafted HTML payloads. The ability to read arbitrary memory also opens avenues for further exploitation chains, including information disclosure attacks against other tabs or processes running within the same user context, thereby compromising the overall confidentiality and integrity of the browser environment.
Mitigation strategies primarily involve updating Google Chrome to version 155.0.8059.39 or later, where these synchronization issues have been addressed through improved locking mechanisms and validation checks in CacheStorage operations. For organizations managing large fleets of devices, deploying automated patch management solutions ensures timely application of security updates across all endpoints. Additionally, users should exercise caution when interacting with untrusted web content and consider enabling additional browser security features such as site isolation policies to limit the blast radius of potential renderer compromises. Security teams should also monitor for indicators of compromise related to memory access anomalies or unusual network activity originating from browser processes, which may signal active exploitation attempts targeting this specific race condition vulnerability aligned with ATT&CK techniques involving sandbox escape and data exfiltration via local system abstraction layers.