CVE-2026-5880Network attack vector

Omnibox spoofing via insufficient browser UI enforcement

Published Apr 8, 2026 · Updated Apr 8, 2026

Incorrect security UI in Google Chrome before 147.0.7727.55 allows remote attackers to spoof the Omnibox via a crafted HTML page. Google identifies insufficient policy enforcement in the browser UI, but the restricted Chromium issue does not disclose the specific code path or policy check that mishandles the page. Exploitation requires a compromised renderer and user interaction with the crafted page; the bounded result is false URL-bar content, not code execution.

CVSS severity4.3
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect security UI in Google Chrome before 147.0.7727.55 allows remote attackers to spoof the Omnibox via a crafted HTML page. Google identifies insufficient policy enforcement in the browser UI, but the restricted Chromium issue does not disclose the specific code path or policy check that mishandles the page. Exploitation requires a compromised renderer and user interaction with the crafted page; the bounded result is false URL-bar content, not code execution.

The record

CVE
CVE-2026-5880
Published
Apr 8, 2026
Updated
Apr 8, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-451, T1036
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 8, 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=147.0.7727.55 <147.0.7727.55

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=147.0.7727.55 <147.0.7727.55

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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