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PatchSiren cyber security CVE debrief

CVE-2026-12467 Google CVE debrief

CVE-2026-12467 is a high-severity use after free vulnerability in Google Chrome's Extensions feature. This vulnerability, which was published on June 17, 2026, allows a remote attacker who has compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. The CVSS score for this vulnerability is 8.3, indicating a high level of severity. Users of Google Chrome prior to version 149.0.7827.155 are affected by this vulnerability. To mitigate this risk, users should update Google Chrome to the latest version. This vulnerability was reported by the Chromium security team and is considered a high-priority issue.

Vendor
Google
Product
Chrome
CVSS
HIGH 8.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-17
Original CVE updated
2026-06-18
Advisory published
2026-06-17
Advisory updated
2026-06-18

Who should care

This vulnerability affects users of Google Chrome, particularly those who use the browser for sensitive activities or in high-risk environments. IT administrators and cybersecurity professionals should prioritize patching this vulnerability to prevent potential sandbox escapes and other malicious activities.

Technical summary

CVE-2026-12467 is a use after free vulnerability in the Extensions feature of Google Chrome. This vulnerability occurs when the browser's Extensions feature attempts to access memory that has already been freed, allowing an attacker to potentially execute arbitrary code. The vulnerability has a CVSS score of 8.3 and is considered high-severity. The vulnerability can be exploited via a crafted HTML page, which can be used to compromise the renderer process and potentially escape the sandbox.

Defensive priority

High

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.155 or later
  • Ensure that all users of Google Chrome are aware of the vulnerability and the importance of updating to the latest version
  • Consider implementing additional security measures, such as sandboxing and isolation, to prevent potential sandbox escapes
  • Monitor Google Chrome for any suspicious activity or potential exploits
  • Implement a vulnerability management program to ensure timely patching of vulnerabilities
  • Consider using a web application firewall to detect and prevent exploitation attempts

Evidence notes

The information provided is based on the CVE record and NVD detail for CVE-2026-12467. The CVE record and NVD detail provide information on the vulnerability, including its severity, CVSS score, and potential impact. [resourceLinkAnnotations:cve-org,nvd]

Sources and references

Verified primary and authoritative sources

  • CVE-2026-12467 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-12467

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-12467 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12467

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

Supplemental 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.