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PatchSiren cyber security CVE debrief

CVE-2026-9902 Google CVE debrief

A use-after-free vulnerability in Google Chrome's Accessibility component, rated High severity by Chromium security, enables sandbox escape from a compromised renderer process. The flaw was addressed in Chrome 148.0.7778.216.

Vendor
Google
Product
Chrome
CVSS
HIGH 8.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-28
Original CVE updated
2026-07-21
Advisory published
2026-05-28
Advisory updated
2026-07-21

Who should care

Organizations with Chrome deployments; security teams monitoring browser-based attack chains; incident responders investigating renderer compromises

Technical summary

CVE-2026-9902 is a use-after-free vulnerability (CWE-416) in the Accessibility component of Google Chrome. The flaw allows a remote attacker who has already compromised the renderer process to potentially escape the Chrome sandbox via a crafted HTML page. Chrome's multi-process architecture isolates web content in renderer processes with restricted privileges; sandbox escape represents escalation to broader system access. The vulnerability was remediated in Chrome Stable channel version 148.0.7778.216, released May 28, 2026. No CISA KEV listing is present as of the CVE modification date.

Defensive priority

high

Recommended defensive actions

  • Update Google Chrome to version 148.0.7778.216 or later
  • Verify browser version via chrome://settings/help
  • Enable automatic updates for Chrome where organizational policy permits
  • Review endpoint detection coverage for renderer process anomalies
  • Monitor for unexpected browser crashes or accessibility service interactions

Evidence notes

CVE published 2026-05-28; modified 2026-05-29. Chrome Stable channel update released same day as CVE publication. Chromium bug tracker reference confirms issue classification.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9902 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9902

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

  • CVE-2026-9902 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9902

    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.