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CVE-2026-78978 Google CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-25T21:17:54.207Z and has not been modified since then. The CVE-2026-78978 vulnerability is an out-of-bounds read issue in ANGLE (Almost Native Graphics Layer Engine) within Google Chrome on Windows platforms. This vulnerability was reported prior to Google Chrome version 152.0.7977.65 and could allow a remote attacker to potentially execute arbitrary code outside the sandbox by providing a crafted HTML page. The issue has been assigned a CVSS score of 8.8, indicating a high severity level. The vulnerability was classified as Medium severity by the Chromium security team. System administrators and users of Google Chrome on Windows platforms should be aware of this vulnerability and take immediate action to update their browsers to the latest version.

Vendor
Google
Product
Chrome
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-25
Original CVE updated
2026-08-26
Advisory published
2026-08-25
Advisory updated
2026-08-26

Who should care

System administrators and users of Google Chrome on Windows platforms should be aware of this vulnerability and take immediate action to update their browsers to the latest version. Additionally, developers and security professionals should be aware of the potential risks associated with this vulnerability and take steps to mitigate them.

Technical summary

The CVE-2026-78978 vulnerability is an out-of-bounds read issue in ANGLE (Almost Native Graphics Layer Engine) within Google Chrome on Windows platforms. This vulnerability was reported prior to Google Chrome version 152.0.7977.65 and could allow a remote attacker to potentially execute arbitrary code outside the sandbox by providing a crafted HTML page. The issue has been assigned a CVSS score of 8.8, indicating a high severity level. The vulnerability was classified as Medium severity by the Chromium security team.

Defensive priority

Medium severity vulnerability in Google Chrome, requiring immediate attention to prevent potential code execution.

Recommended defensive actions

  • Apply the official patch to upgrade Google Chrome to version 152.0.7977.65 or later.
  • Restrict access to sensitive data and systems to minimize potential impact.
  • Monitor for any suspicious activity that could be related to this vulnerability.

Evidence notes

The CVE-2026-78978 record indicates an out-of-bounds read vulnerability in ANGLE within Google Chrome on Windows, prior to version 152.0.7977.65. This issue, with a CVSS score of 8.8, could allow a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. The Chromium security team classified this issue as Medium severity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-78978 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-78978

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

  • CVE-2026-78978 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-78978

    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.