CVE-2026-14420Network attack vector

Sandbox escape via Dawn out-of-bounds memory access

Published Jul 1, 2026 · Updated Jul 1, 2026

Out-of-bounds read and write in Dawn in Google Chrome before 150.0.7871.46 allows remote attackers to escape its sandbox via crafted HTML. The restricted Chromium issue does not disclose the affected Dawn routine or the operation that permits memory access beyond its intended bounds. A user must open the attacker's page; successful exploitation crosses the browser sandbox and can compromise data, code integrity, and availability outside it.

CVSS severity9.6
Critical
EPSS probability0.34%
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 read and write in Dawn in Google Chrome before 150.0.7871.46 allows remote attackers to escape its sandbox via crafted HTML. The restricted Chromium issue does not disclose the affected Dawn routine or the operation that permits memory access beyond its intended bounds. A user must open the attacker's page; successful exploitation crosses the browser sandbox and can compromise data, code integrity, and availability outside it.

The record

CVE
CVE-2026-14420
Published
Jul 1, 2026
Updated
Jul 1, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-125, CWE-787, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=150.0.7871.46 <150.0.7871.46

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=150.0.7871.46 <150.0.7871.46

Published CVSS scores

9.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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-125Out-of-bounds Read
CWE-787Out-of-bounds Write
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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