CVE-2026-76023Network attack vector

Sandbox escape after renderer compromise

Published Aug 20, 2026 · Updated Aug 20, 2026

Sandbox escape in Linux Toolkit Theming in Google Chrome before 151.0.7922.173 allows context-dependent attackers to execute code outside the sandbox via a crafted HTML page. Google has disclosed only that Chrome's Linux Toolkit Theming code mishandles resource control; no public bug, patch diff, or function-level root cause was retrievable from the published record and vendor bulletin. Exploitation requires prior compromise of the renderer process, making this a sandbox-escape stage in a multistep browser exploit chain rather than a single-step web compromise.

CVSS severityUnavailable
Unscored
EPSS probability0.46%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox escape in Linux Toolkit Theming in Google Chrome before 151.0.7922.173 allows context-dependent attackers to execute code outside the sandbox via a crafted HTML page. Google has disclosed only that Chrome's Linux Toolkit Theming code mishandles resource control; no public bug, patch diff, or function-level root cause was retrievable from the published record and vendor bulletin. Exploitation requires prior compromise of the renderer process, making this a sandbox-escape stage in a multistep browser exploit chain rather than a single-step web compromise.

The record

CVE
CVE-2026-76023
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
Go standard library
Product
Google Chrome
Classifications
CWE-913
Attack vector
network
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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=151.0.7922.173 <151.0.7922.173

What conditions does exploitation require?

Attack vectornetwork
Required privilegesUnavailable in this record.

What is affected?

Go standard library · Google Chromeversion=151.0.7922.173 <151.0.7922.173

Published CVSS scores

No CVSS assessment is available in this record.

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-913Improper Control of Dynamically-Managed Code Resources

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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