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PatchSiren cyber security CVE debrief

CVE-2026-11269 Google CVE debrief

CVE-2026-11269 is a vulnerability in Google Chrome prior to version 149.0.7827.53. The vulnerability is related to an inappropriate implementation in Extensions, which allowed an attacker in a privileged network position to execute arbitrary code inside a sandbox via a crafted Chrome Extension. The Chromium security severity of this vulnerability is rated as Low, but the CVSS score is 7.1, indicating a High severity.

Vendor
Google
Product
Chrome
CVSS
HIGH 7.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-05
Original CVE updated
2026-07-23
Advisory published
2026-06-05
Advisory updated
2026-07-23

Who should care

Users of Google Chrome prior to version 149.0.7827.53 should update to the latest version to mitigate this vulnerability. An attacker in a privileged network position could exploit this vulnerability to execute arbitrary code inside a sandbox.

Technical summary

The vulnerability is caused by an inappropriate implementation in Extensions in Google Chrome. This allows an attacker to execute arbitrary code inside a sandbox via a crafted Chrome Extension. The CVSS vector for this vulnerability is CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

Defensive priority

High

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.53 or later.
  • Ensure that Chrome Extensions are only installed from trusted sources.

Evidence notes

The CVE record for CVE-2026-11269 was obtained from the official CVE website [cve-org]. The vulnerability details were obtained from the National Vulnerability Database [nvd].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11269 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11269

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

  • CVE-2026-11269 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11269

    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.