CVE-2026-5275 is a heap buffer overflow vulnerability located in the ANGLE graphics abstraction layer within Google Chrome on Mac platforms. ANGLE translates OpenGL ES calls to native graphics APIs, and a flaw in its memory handling allows an attacker to overflow a heap buffer. This memory corruption can be triggered remotely by delivering a specially crafted HTML page that exploits the vulnerability during rendering. The overflow can overwrite critical memory structures, enabling arbitrary code execution with the privileges of the Chrome process. Since Chrome runs with user-level privileges, successful exploitation could lead to compromise of the user's environment, including access to sensitive data and further lateral movement. The vulnerability affects all Chrome versions on Mac prior to 146.0.7680.178, which contains the fix. No authentication is required, but user interaction is necessary to visit the malicious page. Although no public exploits are known, the high severity rating by Chromium security indicates the flaw is serious and likely exploitable. The absence of a CVSS score requires an independent severity assessment based on impact and exploitability factors.

The impact of CVE-2026-5275 is significant for organizations and individual users running Google Chrome on Mac systems. Successful exploitation allows remote attackers to execute arbitrary code, potentially leading to full system compromise under the context of the logged-in user. This can result in data theft, installation of persistent malware, credential harvesting, and lateral movement within corporate networks. Given Chrome's widespread use as a primary web browser, the attack surface is large, especially in sectors with high Mac adoption such as technology, creative industries, and education. The requirement for user interaction (visiting a malicious webpage) means phishing or drive-by download attacks are likely vectors. The vulnerability undermines the confidentiality, integrity, and availability of affected systems, posing a high risk to organizational security posture if unpatched.

To mitigate CVE-2026-5275, organizations should immediately update all Google Chrome installations on Mac devices to version 146.0.7680.178 or later, which contains the patch for this vulnerability. Network-level defenses such as web filtering and URL reputation services should be employed to block access to known malicious sites that could host exploit pages. Endpoint protection solutions with behavioral detection can help identify exploitation attempts. Security awareness training should emphasize caution when clicking on unknown or suspicious links, especially in emails or messaging platforms. Additionally, enabling Chrome's built-in security features like site isolation and sandboxing can reduce exploitation impact. Regular vulnerability scanning and patch management processes must be enforced to ensure timely updates. Monitoring browser crash logs and unusual process behavior can aid in early detection of exploitation attempts.