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PatchSiren cyber security CVE debrief

CVE-2026-12018 Google CVE debrief

CVE-2026-12018 is a High-severity vulnerability in Google Chrome on Windows, allowing local attackers to perform OS-level privilege escalation via a malicious file. The vulnerability is caused by an inappropriate implementation in Mojo and was patched in version 149.0.7827.115.

Vendor
Google
Product
Chrome
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-11
Original CVE updated
2026-06-23
Advisory published
2026-06-11
Advisory updated
2026-06-23

Who should care

Users of Google Chrome on Windows, particularly those concerned with OS-level security and privilege escalation attacks.

Technical summary

The vulnerability, CVE-2026-12018, has a CVSS score of 8.8 and is classified as High-severity. It affects Google Chrome on Windows prior to version 149.0.7827.115. The vulnerability is caused by an inappropriate implementation in Mojo, which can be exploited by a local attacker to perform OS-level privilege escalation via a malicious file.

Defensive priority

High

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.115 or later.
  • Ensure that all users of Google Chrome on Windows are aware of the vulnerability and the importance of updating to the patched version.

Evidence notes

The vulnerability was published on CVE.org on 2026-06-11T22:16:54.373Z and modified on 2026-06-12T20:51:12.190Z. The CVE record can be found at [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-12018).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-12018 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-12018

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

  • CVE-2026-12018 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12018

    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.