PatchSiren cyber security CVE debrief

CVE-2026-113343 Google CVE debrief

PatchSiren debrief for CVE-2026-113343: Memory corruption in Sandbox 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 impacts Google Chrome deployments, particularly those managing sandbox environments. Defenders should assess exposure, prioritize updates to version 156.0.8078.47 or later, and monitor future Chrome releases for additional security patches. The CVE record confirms the memory corruption vulnerability and provides details on the affected versions.

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 should assess exposure and prioritize updates to version 156.0.8078.47 or later. They should also verify Chrome version, ensure sandboxing is enabled, and monitor Chrome releases for future updates. Additionally, defenders should review compensating controls for exposed systems and track exceptions and retest remediated assets.

Why it matters

CVE-2026-113343 is a memory corruption vulnerability in Google Chrome's Sandbox, allowing remote attackers to execute arbitrary code. Defenders managing Chrome deployments should assess exposure, prioritize updates to version 156.0.8078.47 or later, and monitor future Chrome releases.

Remote code execution inside the sandbox
Potential for attacker exploitation
Need for version verification and updates
Importance of monitoring Chrome releases

Technical summary

Memory corruption vulnerability in Sandbox in Google Chrome prior to 156.0.8078.47 allows remote attackers to execute arbitrary code inside the sandbox via crafted HTML pages. This vulnerability has a Medium security severity according to Chromium. Defenders managing Chrome deployments should assess exposure and prioritize updates to version 156.0.8078.47 or later. The vulnerability is confirmed by the official CVE Program record and NIST NVD detail page. Defenders should verify Chrome version and ensure sandboxing is enabled.

Defensive priority

High

Recommended defensive actions

Update Google Chrome to version 156.0.8078.47 or later
Verify Chrome version and ensure sandboxing is enabled
Monitor Chrome releases for future updates
Review compensating controls for exposed systems while remediation is scheduled and verified
Check relevant monitoring, detection, and logs for exposed assets that need extra review
Track exceptions, retest remediated assets, and close the item only after evidence is documented
Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

Official CVE Program record and NIST NVD detail page confirm memory corruption vulnerability in Google Chrome. Chromium security severity is Medium. The CVE record was published on 2026-10-20T21:02:07.742Z and has not been modified since then. Defenders should verify Chrome version and ensure sandboxing is enabled. The vulnerability allows remote attackers to execute arbitrary code inside the sandbox via crafted HTML pages.

Sources and references

Verified primary and authoritative sources

CVE-2026-113343 CVE Program record
Publisher, destination, and source semantics verified

URL: https://www.cve.org/CVERecord?id=CVE-2026-113343

CVE Program - Official CVE Program record with source-provided CVE metadata.
CVE-2026-113343 NVD vulnerability detail
Publisher, destination, and source semantics verified

URL: https://nvd.nist.gov/vuln/detail/CVE-2026-113343

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

Supplemental references

CVE-2026-113343
Unverified legacy reference

URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/113xxx/CVE-2026-113343.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/502376419

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.