PatchSiren cyber security CVE debrief

CVE-2026-113016 Google CVE debrief

CVE-2026-113016 is a Medium-severity vulnerability in Google Chrome's Extensions, allowing potential arbitrary code execution inside the sandbox via a crafted HTML page. The CVE record was published on 2026-10-20T21:02:21.423Z. Defenders should assess exposure and prioritize updates to 156.0.8078.47 or later. The NVD entry is currently unclassified. This vulnerability impacts Chrome users with Extensions enabled, particularly those in environments where Extensions are widely used. The vulnerability's severity and potential impact necessitate prompt attention from defenders.

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 deployments, particularly those using Extensions, should assess exposure and prioritize updates to 156.0.8078.47 or later. This includes IT and security teams managing Chrome installations in organizational environments. They should review Extension configurations and ensure that Chrome versions are up-to-date to mitigate potential risks associated with this vulnerability.

Why it matters

CVE-2026-113016 is a Medium-severity vulnerability in Google Chrome's Extensions, potentially allowing arbitrary code execution inside the sandbox. Defenders should prioritize verifying Chrome versions and updating to 156.0.8078.47 or later.

Verify Chrome browser versions to prevent potential code execution.
Update to 156.0.8078.47 or later to apply the security patch.
Review Extension configurations to restrict potentially malicious HTML pages.

Technical summary

The vulnerability is caused by improper input validation in Google Chrome's Extensions, potentially allowing a remote attacker to execute arbitrary code inside the sandbox via a crafted HTML page. This issue affects Chrome users with Extensions enabled. Defenders should focus on updating to the latest version and reviewing Extension configurations. Technical details are limited to CVE and NVD information, emphasizing the need for defenders to prioritize updates and reviews of Extension usage within their environments.

Defensive priority

Defenders should prioritize verifying Chrome versions and updating to 156.0.8078.47 or later.

Recommended defensive actions

Verify Chrome browser versions and ensure 156.0.8078.47 or later is deployed.
Review and update Extension configurations to restrict potentially malicious HTML pages.
Monitor Chrome release updates for future security patches.
Perform vulnerability assessments to identify exposed assets.
Implement compensating controls for exposed systems while remediation is scheduled.
Track exceptions and retest remediated assets.
Review relevant monitoring, detection, and logs for exposed assets.

Evidence notes

The CVE Program record and NVD vulnerability detail provide official information on the vulnerability. Supplemental sources include Chrome release updates and issue tracking. Evidence limits are based on CVE and NVD details. Defenders should verify Chrome versions and review Extension configurations. The CVE record has not been modified since publication.

Sources and references

Verified primary and authoritative sources

CVE-2026-113016 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-113016

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-113016 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-113016

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

Supplemental references

CVE-2026-113016
Unverified legacy reference

URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/113xxx/CVE-2026-113016.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/523237501

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.