CVE-2026-126910
Description
A flaw was found in chromium-browser. A remote attacker could achieve arbitrary code execution inside the browser sandbox by tricking a user into visiting a specially crafted HTML page. This vulnerability is caused by a type confusion issue in the V8 JavaScript engine, where data of one type is incorrectly handled as another.
Statement
Red Hat Product Security rates this flaw as an Important severity impact because it allows remote attackers to execute arbitrary code within the browser renderer process if a user is tricked into visiting a malicious webpage. In typical Red Hat Enterprise Linux desktop deployments, Chromium processes web content under standard user privileges, meaning exploitation requires direct interaction from a local user to open untrusted content. While the potential for remote execution elevates the risk above Moderate, the severity does not reach Critical because the compromised process remains confined within the multi-process browser sandbox, preventing direct access to host system resources without an additional sandbox escape.
Mitigation
Operational controls can reduce the risk of exploitation:
1. Avoid visiting untrusted websites or following unverified links.
2. Ensure the browser's built-in security sandbox remains active and is not disabled.
3. Disable JavaScript execution in Chromium site settings to prevent triggering the vulnerable V8 engine.
Caveat: Disabling JavaScript will severely impact the usability and functionality of modern interactive web applications.
Understanding the Weakness (CWE)
Other
Technical Impact: Varies by Context
When the product accesses the resource using an incompatible type, this could trigger logical errors because the resource does not have expected properties.
Availability,Integrity,Confidentiality
Technical Impact: Read Memory; Modify Memory; Execute Unauthorized Code or Commands; DoS: Crash, Exit, or Restart
If a memory buffer is accessed using an incompatible type, and the allocated buffer is smaller than the type that the code is attempting to access, then an attacker could read or write memory outside the bounds of the buffer, leading to a crash or possibly code execution.
Frequently Asked Questions
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