CVE-2026-113311 Google CVE debrief

Who should care

Google Chrome users, particularly those with versions prior to 156.0.8078.47, should assess exposure and update to the latest version. This includes users of Google Chrome in managed environments, such as organizations and enterprises, who should review their Chrome installations and ensure they are up-to-date. Additionally, security teams and vulnerability management teams should review the CVE record and NVD entry for more information on the severity and

Why it matters

CVE-2026-113311 is a use-after-free vulnerability in ServiceWorker in Google Chrome prior to 156.0.8078.47. Defenders should prioritize updating Chrome and monitoring system logs.

• Remote attackers may execute arbitrary code inside the sandbox
• Successful exploitation requires user interaction via a crafted HTML page
• Defenders should prioritize updating Chrome to version 156.0.8078.47 or later
• Verify Chrome version and monitor system logs for potential exploitation attempts

Technical summary

A use-after-free vulnerability in ServiceWorker in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. This vulnerability has a Medium severity level according to Chromium and affects users of Google Chrome prior to version 156.0.8078.47. Defenders should prioritize updating Chrome to version 156.0.8078.47 or later and review system logs for potential exploitation attempts. The vulnerability is in the ServiceWorker component of Google Chrome, which is used for handling background tasks.

Defensive priority

High

Recommended defensive actions

• Update Google Chrome to version 156.0.8078.47 or later
• Review system logs for potential exploitation attempts
• Assess exposure of Chrome installations in your organization
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details on a use-after-free vulnerability in ServiceWorker in Google Chrome prior to 156.0.8078.47. The Chromium security severity is Medium. This vulnerability allows a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. The CVE record was published on 2026-10-20T21:02:03.869Z and has not been modified since then. The source-provided CVE metadata and official NIST NVD detail page offer additional context.

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.