CVE-2023-5473Network attack vector

Heap corruption via Cast use-after-free

Published Oct 11, 2023 · Updated Feb 13, 2025

Use-after-free in Cast in Google Chrome before 118.0.5993.70 allows remote attackers to corrupt heap memory via crafted HTML. Public records identify Cast as the locus but do not disclose which object is freed or which subsequent operation dereferences it. Exploitation requires prior compromise of the renderer process; published evidence bounds the demonstrated consequence to heap corruption.

CVSS severity6.3
Medium
EPSS probability0.70%
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 Cast in Google Chrome before 118.0.5993.70 allows remote attackers to corrupt heap memory via crafted HTML. Public records identify Cast as the locus but do not disclose which object is freed or which subsequent operation dereferences it. Exploitation requires prior compromise of the renderer process; published evidence bounds the demonstrated consequence to heap corruption.

The record

CVE
CVE-2023-5473
Published
Oct 11, 2023
Updated
Feb 13, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-416, T1203
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 11, 2023CVE 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=118.0.5993.70 <118.0.5993.70

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Google Cloud · Google Chromeversion=118.0.5993.70 <118.0.5993.70

Published CVSS scores

6.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

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
PrivilegesUnavailable
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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