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PatchSiren cyber security CVE debrief

CVE-2026-11263 Google CVE debrief

CVE-2026-11263 is a vulnerability in Google Chrome on Android, specifically related to insufficient policy enforcement in WebAuthentication. This issue, with a CVSS score of 6.5 and a Medium severity level, could allow a remote attacker who had compromised the renderer process to leak cross-origin data via a crafted HTML page.

Vendor
Google
Product
Chrome
CVSS
MEDIUM 6.5
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 on Android, particularly those with versions prior to 149.0.7827.53, should be aware of this vulnerability. The issue has been addressed in the latest version of Chrome.

Technical summary

The vulnerability, tracked as CVE-2026-11263, stems from insufficient policy enforcement in WebAuthentication in Google Chrome on Android. This weakness could enable a remote attacker, who has compromised the renderer process, to leak cross-origin data through a specially crafted HTML page. The CVSS score for this vulnerability is 6.5, indicating a Medium severity level.

Defensive priority

Medium

Recommended defensive actions

  • Update Google Chrome on Android to version 149.0.7827.53 or later.
  • Ensure that Chrome is set to automatically update to the latest version.
  • Users should be cautious when clicking on links or visiting unfamiliar websites, especially if they have not been verified as safe.

Evidence notes

The CVE-2026-11263 vulnerability has been analyzed and verified by official sources, including the National Vulnerability Database (NVD) and Google's Chrome team.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11263 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11263

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

  • CVE-2026-11263 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11263

    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.