PatchSiren cyber security CVE debrief

CVE-2026-113271 Google CVE debrief

CVE-2026-113271 debrief based on the supplied source corpus. The CVE record was published on 2026-10-20T21:01:45.544Z. This use-after-free vulnerability in Google Chrome's Accessibility feature allows remote code execution inside the sandbox. Defenders should assess exposure and prioritize patching. The vulnerability has a Critical severity rating and requires immediate attention. The CVE record has not been modified since its publication. The Chromium security severity is Critical. The vulnerability affects Google Chrome versions prior to 156.0.8078.47.

Vendor: Google
Product: Chrome
CVSS: Unknown
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-10-20
Original CVE updated: 2026-10-21
Advisory published: 2026-10-20
Advisory updated: 2026-10-21

Who should care

Defenders responsible for Google Chrome deployments should assess exposure and prioritize patching, as the vulnerability allows remote code execution inside the sandbox. Defenders should review and update incident response plans to account for potential sandbox escapes. The vulnerability has a Critical severity rating and requires immediate attention. Defenders should verify and apply the patch to Google Chrome versions prior to 156.0.8078.47. Defenders

Why it matters

CVE-2026-113271 is a Critical use-after-free vulnerability in Google Chrome's Accessibility feature, allowing remote code execution inside the sandbox. Defenders should prioritize patching and monitoring.

Remote code execution inside the sandbox requires verification of patch deployment
Potential sandbox escape requires monitoring and incident response planning
Vulnerability severity is Critical, requiring immediate attention

Technical summary

The CVE-2026-113271 vulnerability is a use-after-free issue in the Accessibility feature of Google Chrome versions prior to 156.0.8078.47. This allows a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. The vulnerability has a Critical severity rating and requires immediate attention. The CVE record was published on 2026-10-20T21:01:45.544Z and has not been modified since then. The source item provides CVE-2026-113271 details. The Chromium security severity is Critical. The vulnerability affects Google Chrome versions prior to 156.0.8078.47.

Defensive priority

Defenders should prioritize verifying and applying the patch to Google Chrome versions prior to 156.0.8078.47, as the vulnerability allows remote code execution inside the sandbox.

Recommended defensive actions

Verify and apply the patch to Google Chrome versions prior to 156.0.8078.47
Monitor Google Chrome versions for updates and ensure the latest version is deployed
Review and update incident response plans to account for potential sandbox escapes
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 source item provide details on the use-after-free vulnerability in Accessibility in Google Chrome. The Chromium security severity is Critical. The vulnerability allows remote code execution inside the sandbox via a crafted HTML page. The source item provides CVE-2026-113271 details. The CVE Program record provides source-provided CVE metadata.

Sources and references

Verified primary and authoritative sources

CVE-2026-113271 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-113271

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-113271 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-113271

NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

CVE-2026-113271
Unverified legacy reference

URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/113xxx/CVE-2026-113271.json

cve_program_cvelist_v5
Source reference
Unverified legacy reference

URL: https://chromereleases.googleblog.com/2026/10/stable-channel-update-for-desktop_02018666648.html

Supplemental source
Source reference
Unverified legacy reference

URL: https://issues.chromium.org/issues/571618833

Supplemental source

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.