CVE-2023-6702Network attack vector

Heap corruption via V8 type confusion

Published Dec 14, 2023 · Updated Nov 4, 2025

Type confusion in V8 in Google Chrome before 120.0.6099.109 allows remote attackers to corrupt heap memory via crafted HTML. Google has not published the faulty V8 operation or disclosed how the engine assigns an incompatible type to attacker-controlled data. Exploitation requires a user to open crafted HTML; successful heap corruption compromises browser confidentiality, integrity, and availability.

CVSS severity8.8
High
EPSS probability43.80%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Type confusion in V8 in Google Chrome before 120.0.6099.109 allows remote attackers to corrupt heap memory via crafted HTML. Google has not published the faulty V8 operation or disclosed how the engine assigns an incompatible type to attacker-controlled data. Exploitation requires a user to open crafted HTML; successful heap corruption compromises browser confidentiality, integrity, and availability.

The record

CVE
CVE-2023-6702
Published
Dec 14, 2023
Updated
Nov 4, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-843, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 14, 2023CVE publishedPublication date reported by the CVE source.
  2. Nov 4, 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=120.0.6099.109 <120.0.6099.109

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=120.0.6099.109 <120.0.6099.109

Published CVSS scores

8.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
8.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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-843Access of Resource Using Incompatible Type ('Type Confusion')
T1203Exploitation for Client Execution

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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