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CVE-2026-84356 Google CVE debrief

CVE-2026-84356 debrief based on the supplied source corpus. The CVE record was published on 2026-09-02T00:18:29.523Z and has not been modified since then. This UI misrepresentation vulnerability in FullScreen in Google Chrome prior to 152.0.7977.75 allows a remote attacker to spoof the address bar via a crafted HTML page. Defenders should assess exposure and prioritize updating to 152.0.7977.75 or later. The vulnerability has a CVSS score of 4.3 and a severity of MEDIUM. The CVE record and NVD entry provide details on the vulnerability.

Vendor
Google
Product
Chrome
CVSS
MEDIUM 4.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-09-02
Original CVE updated
2026-09-03
Advisory published
2026-09-02
Advisory updated
2026-09-03

Who should care

Defenders responsible for Google Chrome deployments should assess exposure and prioritize updating to 152.0.7977.75 or later. The vulnerability has a CVSS score of 4.3 and a severity of MEDIUM. Defenders should verify Chrome versions to ensure they are not vulnerable and review incident response plans. The CVE record and NVD entry provide details on the vulnerability.

Why it matters

CVE-2026-84356 is a UI misrepresentation vulnerability in Google Chrome that could allow a remote attacker to spoof the address bar. Defenders should prioritize verifying Chrome versions and updating to 152.0.7977.75 or later to mitigate the vulnerability.

  • Spoofing of the address bar could lead to phishing attacks
  • Defenders need to verify Chrome versions to ensure they are not vulnerable
  • Updating to 152.0.7977.75 or later will mitigate the vulnerability

Technical summary

A remote attacker can spoof the address bar via a crafted HTML page due to a UI misrepresentation vulnerability in FullScreen in Google Chrome prior to 152.0.7977.75. The vulnerability has a CVSS score of 4.3 and a severity of MEDIUM. Defenders should prioritize verifying Chrome versions and updating to 152.0.7977.75 or later to mitigate the vulnerability. The CVE record and NVD entry provide details on the vulnerability.

Defensive priority

Defenders should prioritize verifying Chrome versions and updating to 152.0.7977.75 or later.

Recommended defensive actions

  • Verify Chrome version and update to 152.0.7977.75 or later
  • Monitor for potential spoofing attempts
  • Review and update incident response plans

Evidence notes

The CVE record and NVD entry provide details on the UI misrepresentation vulnerability in FullScreen in Google Chrome prior to 152.0.7977.75. The vulnerability allows a remote attacker to spoof the address bar via a crafted HTML page. Defenders should verify Chrome versions and update to 152.0.7977.75 or later. The CVE record was published on 2026-09-02T00:18:29.523Z and has not been modified since then. The vulnerability has a CVSS score of 4.3 and a severity of MEDIUM.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-84356 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-84356

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

  • CVE-2026-84356 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-84356

    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.