CVE-2023-0471Network attack vector

Heap corruption via WebTransport use-after-free

Published Jan 24, 2023 · Updated Oct 22, 2024

Use after free in WebTransport in Google Chrome before 109.0.5414.119 allows remote attackers to corrupt heap memory via crafted HTML. The WebTransport component accesses an object after its memory has been freed, allowing attacker-controlled page processing to corrupt browser heap memory. A user must load attacker-controlled content; public records do not identify the freed object or establish a more specific outcome than heap corruption.

CVSS severity8.8
High
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use after free in WebTransport in Google Chrome before 109.0.5414.119 allows remote attackers to corrupt heap memory via crafted HTML. The WebTransport component accesses an object after its memory has been freed, allowing attacker-controlled page processing to corrupt browser heap memory. A user must load attacker-controlled content; public records do not identify the freed object or establish a more specific outcome than heap corruption.

The record

CVE
CVE-2023-0471
Published
Jan 24, 2023
Updated
Oct 22, 2024
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-416, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 22, 2024Record 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=0 <109.0.5414.119
  2. Affected versionversion=unspecified <109.0.5414.119

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=0 <109.0.5414.119; version=unspecified <109.0.5414.119

Published CVSS scores

8.8CISACVSS: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-416Use After Free
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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