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PatchSiren cyber security CVE debrief

CVE-2026-11309 Google CVE debrief

CVE-2026-11309 is a vulnerability in Google Chrome prior to version 149.0.7827.53. The vulnerability is caused by insufficient policy enforcement in History, which allows a remote attacker to perform UI spoofing via a crafted HTML page. The Chromium security severity of this vulnerability is Low, and the CVSS score is 4.3, which is considered MEDIUM.

Vendor
Google
Product
Chrome
CVSS
MEDIUM 4.3
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.

Technical summary

The vulnerability is caused by insufficient policy enforcement in History in Google Chrome prior to version 149.0.7827.53. This allows a remote attacker to perform UI spoofing via a crafted HTML page.

Defensive priority

The CVSS score of 4.3 indicates a MEDIUM severity vulnerability. However, the Chromium security severity is Low, indicating that this vulnerability may not be as critical as other vulnerabilities with higher CVSS scores.

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.53 or later.

Evidence notes

The CVE record and NVD detail can be found at [cve-org] and [nvd], respectively. Additional information can be found in the release notes [ref-4] and issue tracker [ref-5].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11309 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11309

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

  • CVE-2026-11309 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11309

    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.