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PatchSiren cyber security CVE debrief

CVE-2026-11103 Google CVE debrief

A local attacker can exploit CVE-2026-11103, a Medium-severity privilege escalation vulnerability in Google Chrome's Installer on Windows, by creating a malicious file. This issue was addressed in Chrome version 149.0.7827.53.

Vendor
Google
Product
Chrome
CVSS
HIGH 7.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-04
Original CVE updated
2026-07-23
Advisory published
2026-06-04
Advisory updated
2026-07-23

Who should care

Users of Google Chrome on Windows, particularly those concerned with local privilege escalation vulnerabilities.

Technical summary

The vulnerability, CVE-2026-11103, is caused by inappropriate implementation in the Installer component of Google Chrome on Windows. This issue allows a local attacker to perform OS-level privilege escalation by creating a malicious file. The CVSS score for this vulnerability is 7.8, indicating a High severity level.

Defensive priority

High

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.53 or later to mitigate this vulnerability.
  • Ensure that all users of Google Chrome on Windows are aware of the risks associated with local privilege escalation attacks.

Evidence notes

This vulnerability was reported through the Chromium security bug reporting process and was addressed in the stable channel update for desktop.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11103 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11103

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

  • CVE-2026-11103 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11103

    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.