CVE-2026-19156Network attack vector

Heap corruption via crafted malicious extension

Published Aug 6, 2026 · Updated Aug 6, 2026

Heap buffer overflow in Base in Google Chrome before 151.0.7922.109 allows attackers to corrupt heap memory through a crafted extension. Google identifies the Base component and heap-overwrite class, but restricted bug details do not disclose the faulty allocation, bounds check, or copy operation. Exploitation requires a user to install the malicious extension; successful corruption compromises browser confidentiality, integrity, and availability.

CVSS severity7.5
High
EPSS probability0.26%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in Base in Google Chrome before 151.0.7922.109 allows attackers to corrupt heap memory through a crafted extension. Google identifies the Base component and heap-overwrite class, but restricted bug details do not disclose the faulty allocation, bounds check, or copy operation. Exploitation requires a user to install the malicious extension; successful corruption compromises browser confidentiality, integrity, and availability.

The record

CVE
CVE-2026-19156
Published
Aug 6, 2026
Updated
Aug 6, 2026
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-122, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2026Record 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=151.0.7922.109 <151.0.7922.109

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=151.0.7922.109 <151.0.7922.109

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:H/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-122Heap-based Buffer Overflow
T1204.002User Execution: Malicious File

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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