CVE-2026-121140: Out of bounds read in Internals

Published Sep 6, 2026
·
Updated

Out of bounds read in Internals in Google Chrome prior to 157.0.8103.38 allowed a remote attacker who had compromised the renderer process to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: High)

Credit

Popax21

Affected Software

5 affected componentsFixes available
Google Chrome<157.0.8103.38
157.0.8103.38
debian/chromium*
debian/chromium*
debian/chromium*
debian/chromium<=150.0.7871.100-1~deb12u1, <=156.0.8078.79-1~deb12u1, <=150.0.7871.181-1~deb13u1, <=156.0.8078.79-1~deb13u1, <=156.0.8078.47-1, <=156.0.8078.79-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 157.0.8103.38

Event History

Sep 6, 2026
CVE Published
12:00 AM
Data Sourced
12:00 AM
SeverityWeaknessAffected Software
Nov 3, 2026
CVE Published
via MITRE·08:42 PM
Data Sourced
via MITRE·08:42 PM
DescriptionWeakness
Data Sourced
via NVD·09:17 PM
DescriptionSeverityWeakness
Data Sourced
via OSV·09:17 PM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What attacker access is required for exploitation?

The attacker must first compromise the renderer process. Exploitation also requires the victim to interact with a crafted HTML page.

2

What is the potential impact after successful exploitation?

A successful attacker could potentially execute arbitrary code outside the browser sandbox. The stated impacts include high confidentiality, integrity, and availability effects.

3

Which versions are affected?

Google Chrome versions prior to 157.0.8103.38 are affected. The listed software also includes Debian Chromium, but no fixed Debian package version is provided.

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203