CVE-2026-113340: 
Google Chrome vulnerability analysis and mitigation

CVE-2026-113340 is a memory corruption vulnerability in the ANGLE (Almost Native Graphics Layer Engine) graphics library within Google Chrome on Windows. It allows a remote attacker to potentially read memory inside the Chrome sandbox by tricking a user into visiting a crafted HTML page. The vulnerability was reported by Jinpyo Lee on September 21, 2026, and publicly disclosed on October 20, 2026, as part of the Chrome 156 stable channel release. It affects Google Chrome versions prior to 156.0.8078.47 on Windows and carries a Chromium security severity rating of Medium (Chrome Release, Feedly).

The vulnerability is classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer), indicating a memory buffer boundary violation within Chrome's ANGLE graphics abstraction layer (Feedly). ANGLE translates OpenGL ES API calls to platform-specific graphics APIs (e.g., Direct3D on Windows), and improper bounds checking in this layer can allow out-of-bounds memory reads. Exploitation requires a user to visit a specially crafted HTML page that triggers malicious graphics operations, enabling the attacker to read memory contents within the sandboxed renderer process. The Chromium issue tracker references bug ID 564213722 for this vulnerability (Chrome Release).

Successful exploitation allows a remote, unauthenticated attacker to read sensitive memory contents within the Chrome sandbox process on Windows systems. The primary impact is a confidentiality breach — an attacker could potentially extract sensitive data such as credentials, session tokens, or other in-memory information from the renderer process. Because the vulnerability is constrained to sandbox memory reads, it does not directly enable code execution or sandbox escape, but could serve as a stepping stone in a multi-stage exploit chain (Feedly).

As of the disclosure date, there is no public proof-of-concept exploit and no evidence of active in-the-wild exploitation (Feedly). The EPSS score is reported as 0.0, reflecting a currently low probability of exploitation in the near term. The vulnerability has not been added to the CISA Known Exploited Vulnerabilities (KEV) catalog. No threat actor attribution has been identified at this time.

Google has addressed this vulnerability in Chrome version 156.0.8078.47 (Linux) and 156.0.8078.47/.48 (Windows/Mac). Users and administrators should update Google Chrome to version 156.0.8078.47 or later immediately. Enabling automatic updates is the most reliable way to ensure timely patching. As a temporary measure where immediate updating is not feasible, restricting user access to untrusted websites or disabling JavaScript execution for untrusted content may reduce exposure (Chrome Release).