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CVE-2026-11240 Google CVE debrief

CVE-2026-11240 is a vulnerability in Google Chrome prior to version 149.0.7827.53. The issue is related to insufficient validation of untrusted input in the Loader component. This vulnerability allowed a remote attacker, who had compromised the renderer process, to bypass site isolation via a crafted HTML page. The Chromium security severity of this issue is rated as Low. The CVSS score for this vulnerability is 3.1, indicating a Low severity.

Vendor
Google
Product
Chrome
CVSS
LOW 3.1
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. Additionally, administrators and security teams responsible for managing and securing Chrome installations should prioritize updating to the patched version.

Technical summary

The vulnerability is caused by insufficient validation of untrusted input in the Loader component of Google Chrome. This allows a remote attacker who has compromised the renderer process to bypass site isolation via a crafted HTML page.

Defensive priority

Medium

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.53 or later.
  • Ensure that all Chrome installations are up-to-date with the latest security patches.

Evidence notes

The CVE-2026-11240 vulnerability was published on [cve-org](https://www.cve.org/CVERecord?id=CVE-2026-11240) and has a detailed record on [nvd](https://nvd.nist.gov/vuln/detail/CVE-2026-11240).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-11240 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-11240

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

  • CVE-2026-11240 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-11240

    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.