CVE-2026-8565Network attack vector

UI spoofing via malicious extension installation

Published May 14, 2026 · Updated May 14, 2026

UI spoofing in Google Chrome on Mac before 148.0.7778.168 allows attackers to misrepresent browser interface through a crafted extension. Google identifies Downloads as the affected component but has not disclosed the faulty code path or operation that lets extension-controlled content spoof browser UI. Exploitation requires user installation of a malicious Chrome extension, and the disclosed consequence is limited to spoofing browser UI.

CVSS severity4.7
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

UI spoofing in Google Chrome on Mac before 148.0.7778.168 allows attackers to misrepresent browser interface through a crafted extension. Google identifies Downloads as the affected component but has not disclosed the faulty code path or operation that lets extension-controlled content spoof browser UI. Exploitation requires user installation of a malicious Chrome extension, and the disclosed consequence is limited to spoofing browser UI.

The record

CVE
CVE-2026-8565
Published
May 14, 2026
Updated
May 14, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-451, T1036
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 14, 2026CVE publishedPublication date reported by the CVE source.
  2. May 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=148.0.7778.168 <148.0.7778.168

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=148.0.7778.168 <148.0.7778.168

Published CVSS scores

4.7CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-451User Interface (UI) Misrepresentation of Critical Information
T1036Masquerading

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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