CVE-2023-5346Network attack vector

Heap corruption via V8 type confusion

Published Oct 5, 2023 · Updated May 1, 2025

Type confusion in V8 in Google Chrome before 117.0.5938.149 allows remote attackers to corrupt heap memory via crafted HTML. The public advisory identifies V8 but keeps the bug record restricted, leaving the affected code path and incompatible types undisclosed. A user must load attacker-controlled content, after which heap corruption compromises the browser process's data, integrity, and availability.

CVSS severity8.8
High
EPSS probability1.75%
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 117.0.5938.149 allows remote attackers to corrupt heap memory via crafted HTML. The public advisory identifies V8 but keeps the bug record restricted, leaving the affected code path and incompatible types undisclosed. A user must load attacker-controlled content, after which heap corruption compromises the browser process's data, integrity, and availability.

The record

CVE
CVE-2023-5346
Published
Oct 5, 2023
Updated
May 1, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-843, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 5, 2023CVE publishedPublication date reported by the CVE source.
  2. May 1, 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=117.0.5938.149 <117.0.5938.149

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=117.0.5938.149 <117.0.5938.149

Published CVSS scores

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