CVE-2026-125350 is a critical-severity vulnerability. A remote attacker can exploit this flaw through a specially crafted HTML page, potentially leading to arbitrary code execution within the Chrome sandbox.

This vulnerability affects:

Google Chrome versions prior to 157.0.8103.50 – (Affected)
Other Chromium-based browsers, including Microsoft Edge, Brave, Opera, and Vivaldi – (May be affected until vendor updates are applied)

A remote attacker can exploit this vulnerability through a specially crafted website, potentially leading to code execution, data exposure, browser instability, and further compromise of affected systems.

Step 1 - Lure User to a Malicious Website

The attacker identifies a target and lures them into visiting a specially crafted website hosting a malicious HTML page.

Step 2 - Trigger the Use-After-Free Condition

The crafted page triggers a use-after-free condition within the Chromium rendering engine when processed by the browser.

Step 3 - Memory Corruption Occurs

The browser incorrectly reuses freed memory, allowing the attacker to manipulate memory content and bypass internal protections.

Step 4 - Arbitrary Code Execution

The attacker leverages the corrupted memory to execute arbitrary code within the Chrome sandbox, without providing valid credentials.

CERTVU recommends the following:

1. Upgrade Immediately

   Update Google Chrome to: Windows/macOS: 157.0.8103.50 or 157.0.8103.51; Linux: 157.0.8103.50.

2. Apply Updates to Chromium-Based Browsers

   Apply vendor security updates for Microsoft Edge, Brave, Opera, Vivaldi, and other Chromium-derived browsers.

3. Monitor Endpoint Activity

   Review endpoint and browser telemetry for suspicious activity associated with malicious websites and browser exploitation attempts.

4. Enforce Browser Update Policies

   Organizations should implement automated browser patch management and ensure supported browser versions are deployed across all endpoints.