CVE-2026-113214 Google CVE debrief

Who should care

Defenders responsible for managing Google Chrome deployments, particularly those using the FullScreen feature, should assess potential exposure and prioritize verification and remediation efforts.

Why it matters

CVE-2026-113214 is an improper input validation vulnerability in Google Chrome's FullScreen feature that could allow remote code execution inside the sandbox. Defenders should prioritize verifying Chrome version 156.0.8078.47 or earlier for potential exposure, assess if systems are using the FullScreen feature, and monitor for potential exploitation attempts.

• Potential for remote code execution inside the sandbox
• Need for verification of Chrome version and FullScreen feature usage
• Possible impact on systems using outdated Chrome versions

Technical summary

The CVE-2026-113214 vulnerability is caused by improper input validation in the FullScreen feature of Google Chrome prior to version 156.0.8078.47. This could allow a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. Defenders should prioritize verifying Chrome version 156.0.8078.47 or earlier for potential exposure and assess if systems are using the FullScreen feature. The vulnerability was reported by an external researcher and patched by Google Chrome developers. Users of affected versions should update to 156.0.8078.47 or later to mitigate the vulnerability.

Defensive priority

Defenders should prioritize verifying Chrome version 156.0.8078.47 or earlier for potential exposure and assess if systems are using the FullScreen feature.

Recommended defensive actions

• Verify Chrome version and update to 156.0.8078.47 or later if necessary
• Assess if systems are using the FullScreen feature and monitor for potential exploitation attempts
• Review Chromium issue tracker for additional information
• 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

Evidence is based on official CVE Program and NVD records, as well as supplemental source references from Google Chrome's release blog and Chromium issue tracker. The CVE record was published on 2026-10-20T21:02:39.492Z and has not been modified since then. Defenders should verify Chrome version 156.0.8078.47 or earlier for potential exposure and assess if systems are using the FullScreen feature.

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.