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CVE-2026-79261 Google CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-25T21:18:20.667Z and has not been modified since then. The CVE-2026-79261 vulnerability is caused by incorrect authorization in Controls in Google Chrome prior to 152.0.7977.65. This allows a remote attacker to bypass web origin policy via a crafted HTML page. The vulnerability has a CVSS score of 4.3 and is classified as MEDIUM severity. It was reported that the vulnerability has a Chromium security severity of Low. The CVE Program and NVD have provided official records and assessments of this vulnerability. Administrators and users of Google Chrome should be aware of this vulnerability and take steps to ensure their browsers are updated to the latest version.

Vendor
Google
Product
Chrome
CVSS
MEDIUM 4.3
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

Administrators and users of Google Chrome should be aware of this vulnerability and take steps to ensure their browsers are updated to the latest version. Additionally, developers and security teams should review their applications and systems for potential exposure to this vulnerability.

Technical summary

The CVE-2026-79261 vulnerability is caused by incorrect authorization in Controls in Google Chrome prior to 152.0.7977.65. This allows a remote attacker to bypass web origin policy via a crafted HTML page. The vulnerability has a CVSS score of 4.3 and is classified as MEDIUM severity.

Defensive priority

This vulnerability has a CVSS score of 4.3 and is classified as MEDIUM severity. It allows a remote attacker to bypass web origin policy via a crafted HTML page, which could potentially lead to unauthorized access.

Recommended defensive actions

  • Review and apply the vendor's patch for Google Chrome to ensure the browser is updated to version 152.0.7977.65 or later.
  • Implement web origin policy controls to restrict access to sensitive resources.
  • Monitor for suspicious activity and implement compensating controls to detect potential exploitation attempts.

Evidence notes

The CVE-2026-79261 vulnerability is related to incorrect authorization in Controls in Google Chrome prior to 152.0.7977.65. According to the NVD entry, this vulnerability allows a remote attacker to bypass web origin policy via a crafted HTML page. The Chromium security severity is classified as Low.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-79261 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-79261

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

  • CVE-2026-79261 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-79261

    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.