CVE-2026-14109Network attack vector

Sandbox escape via undisclosed Mojo policy flaw

Published Jun 30, 2026 · Updated Jun 30, 2026

Insufficient policy enforcement in Mojo in Google Chrome before 150.0.7871.47 allows remote attackers to escape the browser sandbox. Google has not disclosed which Mojo policy check is missing or how crafted HTML reaches it; the linked Chromium issue remains access-restricted. Exploitation requires user interaction with a crafted HTML page and prior compromise of the renderer process, after which the attacker crosses Chrome's sandbox boundary.

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

Insufficient policy enforcement in Mojo in Google Chrome before 150.0.7871.47 allows remote attackers to escape the browser sandbox. Google has not disclosed which Mojo policy check is missing or how crafted HTML reaches it; the linked Chromium issue remains access-restricted. Exploitation requires user interaction with a crafted HTML page and prior compromise of the renderer process, after which the attacker crosses Chrome's sandbox boundary.

The record

CVE
CVE-2026-14109
Published
Jun 30, 2026
Updated
Jun 30, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-20, CWE-602, T1068
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 30, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 30, 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=150.0.7871.47 <150.0.7871.47

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Go standard library · Google Chromeversion=150.0.7871.47 <150.0.7871.47

Published CVSS scores

9.6CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
9.6NIST NVDCVSS: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-20Improper Input Validation
CWE-602Client-Side Enforcement of Server-Side Security
T1068Exploitation for Privilege Escalation

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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