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CVE-2026-79221 Google CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-25T21:18:16.197Z and has not been modified since then. The CVE-2026-79221 vulnerability is caused by an uninitialized resource in Dawn within Google Chrome prior to version 152.0.7977.65. This issue allows a remote attacker to potentially read memory inside the sandbox via a crafted HTML page, classified as CWE-908. The vulnerability has a CVSS score of 6.5 and is considered Medium severity. Affected product deployments should be reviewed for potential exposure, and owners should be assigned for follow-up. The official CVE Program record and NIST NVD detail page provide further information on this vulnerability.

Vendor
Google
Product
Chrome
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-25
Original CVE updated
2026-08-31
Advisory published
2026-08-25
Advisory updated
2026-08-31

Who should care

IT administrators and security teams responsible for managing Google Chrome installations, especially in environments where exposure to untrusted HTML pages is common.

Technical summary

The CVE-2026-79221 vulnerability is caused by an uninitialized resource in Dawn within Google Chrome prior to version 152.0.7977.65. This issue allows a remote attacker to potentially read memory inside the sandbox via a crafted HTML page, classified as CWE-908. The vulnerability has a CVSS score of 6.5 and is considered Medium severity.

Defensive priority

Medium severity vulnerability in Google Chrome, requiring immediate attention to prevent potential memory reads.

Recommended defensive actions

  • Apply the latest Google Chrome update (version 152.0.7977.65 or later) to patch the vulnerability.
  • Restrict access to untrusted HTML pages, especially those from unknown sources.
  • Monitor Google Chrome for any subsequent updates or advisories related to this vulnerability.
  • Consider implementing sandboxing and memory protection mechanisms to limit the impact of potential attacks.
  • Perform regular vulnerability assessments and penetration testing to identify and address potential weaknesses.

Evidence notes

The CVE-2026-79221 record indicates an uninitialized resource in Dawn within Google Chrome prior to version 152.0.7977.65. This issue, with a CVSS score of 6.5 and classified as Medium severity, could allow a remote attacker to potentially read memory inside the sandbox via a crafted HTML page. The vulnerability is associated with CWE-908. Official sources include the CVE Program and the NIST National Vulnerability Database.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-79221 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-79221

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

  • CVE-2026-79221 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-79221

    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.