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CVE-2026-87473 Google CVE debrief

CVE-2026-87473 debrief: Google Chrome FileHandling authorization bypass via crafted HTML page. This incorrect authorization vulnerability in FileHandling allows a remote attacker to bypass system access restrictions via social engineering and a crafted HTML page. Defenders should assess exposure and prioritize verification of Chrome version, updating to 153.0.8010.36 or later. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. It was published on 2026-09-09T01:17:03.883Z 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
2026-09-09
Original CVE updated
2026-09-14
Advisory published
2026-09-09
Advisory updated
2026-09-14

Who should care

Defenders responsible for Google Chrome deployments should assess exposure and prioritize verification of Chrome version and update to 153.0.8010.36 or later.

Why it matters

CVE-2026-87473 is an incorrect authorization vulnerability in FileHandling in Google Chrome prior to 153.0.8010.36. Defenders responsible for Google Chrome deployments should assess exposure and prioritize verification of Chrome version and update to 153.0.8010.36 or later.

  • Verify Chrome version and update to 153.0.8010.36 or later to prevent authorization bypass
  • Assess exposure to crafted HTML pages to prevent social engineering attempts
  • Monitor for social engineering attempts to bypass system access restrictions

Technical summary

CVE-2026-87473 is an incorrect authorization vulnerability in FileHandling in Google Chrome prior to 153.0.8010.36. A remote attacker could leverage social engineering to bypass system access restrictions via a crafted HTML page. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. Defenders should assess exposure and prioritize verification of Chrome version and update to 153.0.8010.36 or later.

Defensive priority

Assess exposure, prioritize verification of Chrome version and update to 153.0.8010.36 or later

Recommended defensive actions

  • Verify Chrome version and update to 153.0.8010.36 or later
  • Assess exposure to crafted HTML pages
  • Monitor for social engineering attempts

Evidence notes

Official CVE Program record and NIST NVD detail page provide information on CVE-2026-87473. Google Chrome releases blog post and Chromium issue tracker provide additional context.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-87473 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-87473

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

  • CVE-2026-87473 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-87473

    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.