InfoSecBulletin Cybersecurity for mankind
Google has released Chrome version 146 with important security updates for Windows, Mac, and Linux users. If the flaw remains unpatched, attackers run arbitrary code, compromise systems, or cause denial-of-service issues.
The critical vulnerability in this release is CVE-2026-3913, which is a severe heap buffer overflow in the WebML component.
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Tobias Wienand discovered a memory corruption issue that resulted in a $33,000 bug bounty. A heap buffer overflow happens when a program exceeds the allocated memory size.
Threat actors can take advantage of this flaw to overwrite nearby memory, which may allow remote code execution (RCE) just by visiting a malicious web page.
High-Severity Vulnerabilities Patched
Google fixed 11 high-severity vulnerabilities, including a critical flaw. Two high-severity bugs in the WebML API (CVE-2026-3914 and CVE-2026-3915) each received $43,000 in bounties.
Key High-severity fixes include:
CVE-2026-3916: An out-of-bounds read flaw in the Web Speech component.
CVE-2026-3917 & CVE-2026-3918: Use-after-free vulnerabilities in the Agents and WebMCP components.
CVE-2026-3919: A use-after-free bug in Chrome Extensions.
CVE-2026-3921 to CVE-2026-3924: Multiple use-after-free bugs affecting TextEncoding, MediaStream, WebMIDI, and WindowDialog.
The update fixes several Medium and Low-severity issues, including incorrect security UI in PictureInPicture and weak policy enforcement in PDF and DevTools.
Google awarded over $150,000 in total bug bounties to independent researchers who found these issues before they could be exploited.
Google limits access to certain bug details and exploit links to protect users until most have updated their browsers. This stops attackers from reverse-engineering patches to exploit vulnerable users. With increasing attacks on web browsers, timely security updates are crucial for individuals and organizations to fend off advanced threats.
To ensure your browser is protected, open Google Chrome, navigate to the three-dot menu, select “Help,” and click on “About Google Chrome.”
