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CVE-2026-19166 Google CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-06T22:16:59.037Z and has not been modified since then. The CVE-2026-19166 vulnerability is a use-after-free issue in Web Authentication in Google Chrome prior to 151.0.7922.109. This could allow a remote attacker to potentially perform a sandbox escape via a crafted HTML page. The vulnerability has a CVSS score of 9.6 and is rated as High by Chromium. Affected product deployments should prioritize patching to version 151.0.7922.109 or later. Users of Google Chrome prior to version 151.0.7922.109 should be aware of this vulnerability and take immediate action to patch their browsers. This vulnerability could potentially allow a remote attacker to perform a sandbox escape, which could lead to further exploitation. IT operators, security teams, and platform administrators are particularly impacted as they need to assess exposure, apply patches, and monitor for potential attacks.

Vendor
Google
Product
Chrome
CVSS
CRITICAL 9.6
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-06
Original CVE updated
2026-08-08
Advisory published
2026-08-06
Advisory updated
2026-08-08

Who should care

Users of Google Chrome prior to version 151.0.7922.109 should be aware of this vulnerability and take immediate action to patch their browsers. This vulnerability could potentially allow a remote attacker to perform a sandbox escape, which could lead to further exploitation. IT operators, security teams, and platform administrators are particularly impacted as they need to assess exposure, apply patches, and monitor for potential attacks. Vulnerability management and security teams should review compensating controls and verify patch deployment across their environments.

Technical summary

The CVE-2026-19166 vulnerability is a use-after-free issue in Web Authentication in Google Chrome prior to 151.0.7922.109. This could allow a remote attacker to potentially perform a sandbox escape via a crafted HTML page. The vulnerability has a CVSS score of 9.6 and is rated as High by Chromium. Affected product deployments should prioritize patching to version 151.0.7922.109 or later. Technical details are sourced from official CVE and NVD records.

Defensive priority

Patching Chrome to version 151.0.7922.109 or later is crucial to mitigate the use-after-free vulnerability in Web Authentication, which could allow a remote attacker to potentially perform a sandbox escape via a crafted HTML page.

Recommended defensive actions

  • Patch Chrome to version 151.0.7922.109 or later
  • Review and apply vendor advisories
  • Monitor for crafted HTML pages
  • Inventory checks for affected Chrome versions
  • Exception tracking for compensating controls

Evidence notes

The CVE-2026-19166 record indicates a use-after-free vulnerability in Web Authentication in Google Chrome prior to 151.0.7922.109. The Chromium security severity is rated as High with a CVSS score of 9.6. Official sources include the CVE.org record, NVD detail, and vendor advisories. Defenders should verify patch deployment, review Web Authentication usage, and monitor for crafted HTML pages. Evidence is limited to public sources and may not reflect all affected systems or exploitation details.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-06T22:16:59.037Z and has not been modified since then.