CVE-2026-118309
Description
An improper input validation flaw was found in the UI component of the Chromium browser.
Upstream bug(s):
Statement
Red Hat Product Security rates the severity of this flaw as determined by the Google Chrome Security Advisory.
Mitigation
--- CME Mitigation Guidance (2026-11-03) ---
Disclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from https://cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure.
The highest-value action is to validate untrusted input handling within the UI component to prevent sandbox escape: upgrade to Chromium 156.0.8078.73 (or the fixed Chromium builds), which validates UI component inputs to prevent sandbox escape and arbitrary code execution, closing crafted HTML page. Until patched, this is a concern on Android deployments, so restrict user browsing of untrusted websites and prevent opening unverified HTML pages. These controls limit blast radius and contain exploitation, but they do not fix the underlying improper input validation defect — apply the upstream patch to fully remediate.
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