PatchSiren cyber security CVE debrief

CVE-2026-113031 Google CVE debrief

A memory corruption vulnerability in Google Chrome on Windows prior to version 156.0.8078.47 could allow a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. This issue, tracked as CVE-2026-113031, was publicly disclosed on October 20, 2026, and the CVE record was last modified on October 21, 2026. The vulnerability exists in Google Chrome on Windows, which is a widely used browser, and its exploitation could lead to arbitrary code execution. Defenders should assess their exposure, particularly in environments where users access untrusted web content, and prioritize updates to prevent potential attacks.

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 managing Google Chrome installations, particularly in environments where exposure to untrusted web content is possible, should assess their exposure and prioritize updates to prevent potential attacks.

Why it matters

CVE-2026-113031 is a memory corruption vulnerability in Google Chrome on Windows that could allow remote attackers to execute arbitrary code inside the sandbox. Defenders should prioritize updates to prevent potential attacks.

Potential remote code execution inside the sandbox
Medium severity according to Chromium's security rating
Requires updating Google Chrome to version 156.0.8078.47 or later for mitigation

Technical summary

The CVE-2026-113031 vulnerability is a memory corruption issue in Google Chrome on Windows. It allows a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. The issue was publicly disclosed on October 20, 2026, and the CVE record was last modified on October 21, 2026. This vulnerability is rated as Medium severity according to Chromium's security severity rating. The vulnerability affects Google Chrome on Windows prior to version 156.0.8078.47. To mitigate this vulnerability, defenders should prioritize updating Google Chrome to version 156.0.8078.47 or later.

Defensive priority

Defenders should prioritize updating Google Chrome to version 156.0.8078.47 or later to prevent potential code execution attacks. This is a Medium severity issue according to Chromium's security severity rating.

Recommended defensive actions

Update Google Chrome to version 156.0.8078.47 or later
Review and monitor Google Chrome versions for compliance
Implement sandboxing and isolation measures for critical systems
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 vulnerability, including its existence in Google Chrome on Windows prior to version 156.0.8078.47. The Chromium security severity is rated as Medium.

Sources and references

Verified primary and authoritative sources

CVE-2026-113031 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-113031

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-113031 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-113031

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

Supplemental references

CVE-2026-113031
Unverified legacy reference

URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/113xxx/CVE-2026-113031.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/532939000

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.