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CVE-2026-12017 Google CVE debrief

CVE-2026-12017 is a High-severity vulnerability in Google Chrome prior to 149.0.7827.115. This issue is related to an inappropriate implementation in Extensions, which allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. The CVSS score for this vulnerability is 3.1, with a severity rating of LOW. The vulnerability was published on [cvePublishedAt](https://www.cve.org/CVERecord?id=CVE-2026-12017) and last modified on [cveModifiedAt](https://nvd.nist.gov/vuln/detail/CVE-2026-12017).

Vendor
Google
Product
Chrome
CVSS
LOW 3.1
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-11
Original CVE updated
2026-06-23
Advisory published
2026-06-11
Advisory updated
2026-06-23

Who should care

Users of Google Chrome prior to version 149.0.7827.115 should update to the latest version to mitigate this vulnerability.

Technical summary

The vulnerability is caused by an inappropriate implementation in Extensions in Google Chrome prior to 149.0.7827.115. This allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page.

Defensive priority

High

Recommended defensive actions

  • Update Google Chrome to version 149.0.7827.115 or later.
  • Refer to [ref-4](https://chromereleases.googleblog.com/2026/06/stable-channel-update-for-desktop_01962725236.html) for vendor advisory.

Evidence notes

The CVE record [cve-org] and NVD detail [nvd] provide additional information about this vulnerability.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-12017 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-12017

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

  • CVE-2026-12017 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-12017

    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.