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CVE-2026-79266 Google CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-25T21:18:21.213Z and has not been modified since then. The CVE-2026-79266 vulnerability is a use-after-free issue in DevTools of Google Chrome prior to version 152.0.7977.65. This vulnerability allows a remote attacker to execute arbitrary code inside the sandbox via a crafted Chrome extension, leveraging social engineering tactics. The vulnerability's CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating a high severity with a score of 8.8. The CWE-416 weakness is associated with this vulnerability. Chrome users and administrators should prioritize patching.

Vendor
Google
Product
Chrome
CVSS
HIGH 8.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-25
Original CVE updated
2026-08-31
Advisory published
2026-08-25
Advisory updated
2026-08-31

Who should care

Google Chrome users and administrators should be aware of this vulnerability and take immediate action to patch their installations. This vulnerability requires social engineering tactics to exploit, but the impact can be significant if successful.

Technical summary

The CVE-2026-79266 vulnerability is a use-after-free issue in DevTools of Google Chrome prior to version 152.0.7977.65. This vulnerability allows a remote attacker to execute arbitrary code inside the sandbox via a crafted Chrome extension, leveraging social engineering tactics. The vulnerability's CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating a high severity with a score of 8.8. The CWE-416 weakness is associated with this vulnerability.

Defensive priority

This vulnerability has a high CVSS score of 8.8 and is classified as HIGH severity. It allows a remote attacker to execute arbitrary code inside the sandbox via a crafted Chrome extension, leveraging social engineering. Chrome users and administrators should prioritize patching.

Recommended defensive actions

  • Apply the official patch to update Google Chrome to version 152.0.7977.65 or later.
  • Restrict user access to DevTools or limit the installation of extensions.
  • Monitor user interactions with DevTools and extension installations.
  • Educate users about social engineering tactics and safe browsing practices.

Evidence notes

The CVE-2026-79266 vulnerability is a use-after-free issue in DevTools of Google Chrome prior to version 152.0.7977.65. The vulnerability allows a remote attacker to execute arbitrary code inside the sandbox via a crafted Chrome extension, requiring social engineering tactics. The Chromium security severity is rated as Medium, but the CVSS score is 8.8, indicating a high severity. The official CVE Program record and NVD vulnerability detail provide primary sources for this information.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-79266 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-79266

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

  • CVE-2026-79266 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-79266

    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.