CVE-2026-113021 Google CVE debrief

Who should care

Defenders responsible for managing Google Chrome deployments should assess exposure and prioritize verification and updates to prevent potential code execution. This includes IT teams managing Google Chrome installations, security teams monitoring for suspicious activity, and operators responsible for ensuring the security of Google Chrome deployments. Defenders should also review compensating controls for exposed systems while remediation is scheduled and

Why it matters

CVE-2026-113021 is a use-after-free vulnerability in WebAppInstalls in Google Chrome that allows remote attackers to execute arbitrary code inside the sandbox. Defenders should prioritize verifying and updating Google Chrome to prevent potential code execution.

• Potential remote code execution inside the sandbox
• Requires verification of Google Chrome version and updates
• Defenders should monitor for suspicious activity
• Remediation priority for Google Chrome deployments

Technical summary

The vulnerability exists in WebAppInstalls in Google Chrome prior to version 156.0.8078.47. A remote attacker can exploit this vulnerability by providing a crafted HTML page, potentially leading to arbitrary code execution inside the sandbox. The vulnerability is considered to be of low severity by the Chromium security team. Defenders should prioritize verifying and updating Google Chrome to version 156.0.8078.47 or later to prevent potential code execution. Additional technical details are limited, and defenders should review the official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Defensive priority

Defenders should prioritize verifying and updating Google Chrome to version 156.0.8078.47 or later to prevent potential code execution.

Recommended defensive actions

• Verify and update Google Chrome to version 156.0.8078.47 or later
• Monitor Google Chrome for any suspicious activity
• Implement sandboxing and isolation measures for Google Chrome
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerability, including its existence in Google Chrome prior to version 156.0.8078.47. The vulnerability was reported by a researcher and is considered to be of low severity by the Chromium security team. Additional information can be found in the official CVE Program record and the NIST NVD detail page. However, the current details are limited, and defenders should verify the affected scope and vendor guidance to assess exposure.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.