CVE-2024-3840Network attack vector

Navigation restriction bypass via crafted HTML

Published Apr 17, 2024 · Updated Feb 13, 2025

Insufficient policy enforcement in Google Chrome before 124.0.6367.60 allows remote attackers to bypass navigation restrictions via crafted HTML. Google identifies the affected locus only as Site Isolation and has not published the specific policy check or navigation path that mishandles the page. Exploitation requires a user to load attacker-controlled HTML and crosses a navigation boundary, with no reported code execution or service interruption.

CVSS severity7.5
High
EPSS probability0.85%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insufficient policy enforcement in Google Chrome before 124.0.6367.60 allows remote attackers to bypass navigation restrictions via crafted HTML. Google identifies the affected locus only as Site Isolation and has not published the specific policy check or navigation path that mishandles the page. Exploitation requires a user to load attacker-controlled HTML and crosses a navigation boundary, with no reported code execution or service interruption.

The record

CVE
CVE-2024-3840
Published
Apr 17, 2024
Updated
Feb 13, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-285, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 17, 2024CVE publishedPublication date reported by the CVE source.
  2. Feb 13, 2025Record 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=124.06367.60
  2. Affected versionversion=124.0.6367.60 <124.0.6367.60

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=124.06367.60; version=124.0.6367.60 <124.0.6367.60

Published CVSS scores

6.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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-285Improper Authorization
T1189Drive-by Compromise

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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