CVE-2026-118316
Description
An improper input validation flaw was found in the V8 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 disable JIT compilation via --jitless or enforce V8 memory sandboxing in Chromium instances: upgrade to Google Chrome 156.0.8078.73+ (or the fixed Chromium builds), which validates input in the V8 engine to prevent sandbox escapes during script execution, closing crafted HTML page. Until patched, this is a concern on Chromium installations opening untrusted web content across all operating systems, so restrict user navigation to untrusted sites and prevent loading unverified or external HTML documents. As a compensating measure, monitor process behavior with EDR agents to detect unauthorized execution following a browser sandbox escape, use Falco or eBPF runtime security to detect anomalous child process creation or abnormal system calls, and ensure Address Space Layout Randomization is enforced to hinder reliable shellcode and ROP payload execution. 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.
Highest-impact CME: CME-919 JIT Compiler Hardening (JIT Restriction / V8 Sandbox) (high)
Understanding the Weakness (CWE)
Availability
Technical Impact: DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory)
An attacker could provide unexpected values and cause a program crash or arbitrary control of resource allocation, leading to excessive consumption of resources such as memory and CPU.
Confidentiality
Technical Impact: Read Memory; Read Files or Directories
An attacker could read confidential data if they are able to control resource references.
Integrity,Confidentiality,Availability
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
An attacker could use malicious input to modify data or possibly alter control flow in unexpected ways, including arbitrary command execution.
Frequently Asked Questions
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