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CVE-2026-17947 Google CVE debrief

A use-after-free vulnerability in WebSockets in Google Chrome prior to 151.0.7922.72 allows remote attackers to potentially perform a sandbox escape via a crafted HTML page. The vulnerability has a CVSS score of 9.6 and is considered CRITICAL. Defenders responsible for managing Google Chrome deployments should assess exposure and prioritize updates to prevent potential sandbox escapes. The vulnerability is a use-after-free issue in WebSockets, which could allow a remote attacker to potentially perform a sandbox escape via a crafted HTML page. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Vendor
Google
Product
Chrome
CVSS
CRITICAL 9.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-07-30
Original CVE updated
2026-10-23
Advisory published
2026-07-30
Advisory updated
2026-10-23

Who should care

Defenders responsible for managing Google Chrome deployments should assess exposure and prioritize updates to prevent potential sandbox escapes.

Why it matters

Defenders should prioritize updating Google Chrome to version 151.0.7922.72 or later to prevent potential sandbox escapes via a crafted HTML page.

  • Potential sandbox escape via crafted HTML page
  • Remote attackers could exploit this vulnerability
  • Requires updating Google Chrome to version 151.0.7922.72 or later

Technical summary

The vulnerability is a use-after-free issue in WebSockets in Google Chrome prior to 151.0.7922.72. This could allow a remote attacker to potentially perform a sandbox escape via a crafted HTML page. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Defensive priority

Defenders should prioritize updating Google Chrome to version 151.0.7922.72 or later to prevent potential sandbox escapes.

Recommended defensive actions

  • Update Google Chrome to version 151.0.7922.72 or later
  • Review and monitor WebSocket usage in your organization
  • Implement additional security measures to prevent sandbox escapes

Evidence notes

The vulnerability is described as a use-after-free issue in WebSockets, which could allow a remote attacker to potentially perform a sandbox escape via a crafted HTML page. The CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-17947 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-17947

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

  • CVE-2026-17947 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-17947

    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.