CVE-2025-14766Network attack vector

Heap corruption via V8 out-of-bounds access

Published Dec 16, 2025 · Updated Dec 16, 2025

Out-of-bounds access in Google Chrome before 143.0.7499.147 allows remote attackers to corrupt V8 heap memory via crafted HTML. V8 reads and writes beyond an intended memory boundary, but Google has not disclosed the affected function or faulty bounds operation. A user must load attacker-controlled HTML, and the bounded reported consequence is corruption of browser-process heap memory.

CVSS severity8.8
High
EPSS probability3.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in Google Chrome before 143.0.7499.147 allows remote attackers to corrupt V8 heap memory via crafted HTML. V8 reads and writes beyond an intended memory boundary, but Google has not disclosed the affected function or faulty bounds operation. A user must load attacker-controlled HTML, and the bounded reported consequence is corruption of browser-process heap memory.

The record

CVE
CVE-2025-14766
Published
Dec 16, 2025
Updated
Dec 16, 2025
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-125, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 16, 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=143.0.7499.147 <143.0.7499.147

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=143.0.7499.147 <143.0.7499.147

Published CVSS scores

8.8GitHub Advisory 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 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-125Out-of-bounds Read
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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