CVE-2026-126908
Description
A flaw was found in chromium-browser. A type confusion vulnerability in the V8 JavaScript engine—where memory data of one type is incorrectly treated as another—allows a remote attacker to execute arbitrary code within the browser sandbox. An attacker could exploit this flaw by enticing a user to visit a specially crafted HTML page.
Statement
This vulnerability is rated as Important because remote attackers can achieve arbitrary code execution within the renderer sandbox by convincing a user to navigate to a malicious website, without requiring prior privileges. Although Chromium's multi-process sandbox restricts direct compromise of the underlying host operating system, executing arbitrary code inside the renderer breaks the confidentiality and integrity of the user's active session. On Red Hat Enterprise Linux, the browser is run interactively as a desktop client, requiring user interaction to encounter untrusted web content rather than exposing an unattended network service.
Mitigation
Operational mitigation involves restricting exposure to untrusted web content and ensuring renderer sandboxing protections remain enforced:
1. Operational controls:
Avoid visiting untrusted, suspicious, or unfamiliar websites, and do not follow untrusted links.
2. Enforce sandboxing:
Ensure that the browser sandbox is enabled. Do not launch the application with the `--no-sandbox` command-line option.
3. Restrict JavaScript execution:
In environments where untrusted web content must be inspected, disable JavaScript or restrict it to trusted domains via the browser configuration settings (Settings -> Privacy and security -> Site settings -> JavaScript). Alternatively, launch the browser with JavaScript disabled:
chromium-browser --disable-javascript
Caveat: Disabling JavaScript will severely impact functionality and render many modern web applications unusable.
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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