CVE-2026-19558Network attack vector

Sandboxed code execution via extension use-after-free

Published Aug 11, 2026 · Updated Aug 11, 2026

Use after free in Google Chrome Extensions before 151.0.7922.137 allows attackers to execute code in the sandbox via a crafted extension. Google identifies the Extensions component but keeps the underlying bug details restricted, so the exact stale object and lifetime error are undisclosed. Exploitation requires convincing a user to install the malicious extension; the published impact is code execution confined to the browser sandbox.

CVSS severity7.5
High
EPSS probability0.24%
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 151.0.7922.137 allows attackers to execute code in the sandbox via a crafted extension. Google identifies the Extensions component but keeps the underlying bug details restricted, so the exact stale object and lifetime error are undisclosed. Exploitation requires convincing a user to install the malicious extension; the published impact is code execution confined to the browser sandbox.

The record

CVE
CVE-2026-19558
Published
Aug 11, 2026
Updated
Aug 11, 2026
Vendor
Google Cloud
Product
Google Chrome
Classifications
CWE-416, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 11, 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=151.0.7922.137 <151.0.7922.137

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Google Cloud · Google Chromeversion=151.0.7922.137 <151.0.7922.137

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-416Use After Free
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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