CVE-2023-5187Network attack vector

Heap corruption via freed extension object

Published Sep 28, 2023 · Updated Feb 13, 2025

Use after free in Google Chrome Extensions before 117.0.5938.132 allows attackers to corrupt heap memory through a crafted HTML page. The Extensions component accesses an object after its lifetime ends, allowing page processing to reuse or corrupt its freed heap storage. Exploitation requires a user to install an attacker-supplied extension and then process crafted page content; public records disclose no narrower code locus or demonstrated code-execution outcome.

CVSS severity8.8
High
EPSS probability0.84%
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 Google Chrome Extensions before 117.0.5938.132 allows attackers to corrupt heap memory through a crafted HTML page. The Extensions component accesses an object after its lifetime ends, allowing page processing to reuse or corrupt its freed heap storage. Exploitation requires a user to install an attacker-supplied extension and then process crafted page content; public records disclose no narrower code locus or demonstrated code-execution outcome.

The record

CVE
CVE-2023-5187
Published
Sep 28, 2023
Updated
Feb 13, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-416, T1176.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 28, 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=117.0.5938.132 <117.0.5938.132

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=117.0.5938.132 <117.0.5938.132

Published CVSS scores

8.8NIST National Vulnerability DatabaseCVSS: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
T1176.001Browser Extensions

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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