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PatchSiren cyber security CVE debrief

CVE-2026-79260 Google CVE debrief

The CVE-2026-79260 vulnerability, caused by improper input validation in Cookies in Google Chrome prior to version 152.0.7977.65, allows a remote attacker who has compromised the renderer process to bypass web origin policy via a crafted HTML page. This issue is rated as Low severity by the Chromium security team. Users of Google Chrome, especially those who use the browser for sensitive activities, should be aware of this vulnerability and take steps to update their browser to the latest version. The CVE record was published on 2026-08-25T21:18:20.560Z and has not been modified since then.

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

Google Chrome users, especially those who use the browser for sensitive activities, should be aware of this vulnerability and take steps to update their browser to the latest version. This includes users in managed environments who should confirm whether affected product deployments exist and assign an owner for follow-up.

Technical summary

The CVE-2026-79260 vulnerability is caused by improper input validation in Cookies in Google Chrome prior to version 152.0.7977.65. This allows a remote attacker who has compromised the renderer process to bypass web origin policy via a crafted HTML page. The vulnerability impacts Google Chrome users, particularly those using the browser for sensitive activities. To address this issue, users should update to version 152.0.7977.65 or later.

Defensive priority

Google Chrome users should prioritize updating to version 152.0.7977.65 or later to address the improper input validation vulnerability in Cookies.

Recommended defensive actions

  • Update Google Chrome to version 152.0.7977.65 or later
  • Verify that Chrome is up-to-date
  • Monitor for suspicious activity
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE-2026-79260 record indicates that Google Chrome versions prior to 152.0.7977.65 are vulnerable to improper input validation in Cookies, allowing a remote attacker to bypass web origin policy via a crafted HTML page. The Chromium security severity is rated as Low.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-79260 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-79260

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

  • CVE-2026-79260 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-79260

    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.