CVE-2026-113281: Missing authorization in SiteIsolation

Q: Who is exposed to this issue?

Users running Google Chrome versions earlier than 156.0.8078.47 are exposed if they can be induced to load a crafted HTML page. The described impact is potential arbitrary code execution inside the browser sandbox.

Q: What does an attacker need to exploit it?

The attacker needs to provide or cause the target to load a crafted HTML page remotely. The available information does not state that local access, authentication, or a separate vulnerability is required.

Q: How can I determine whether an installation is affected?

Check the installed Google Chrome version. Versions prior to 156.0.8078.47 are affected according to the available advisory information; version 156.0.8078.47 or later is not described as affected.

Published Apr 1, 2026

Updated

Chromium CVE-2026-113281: Memory corruption

Other sources

Memory corruption in SiteIsolation in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code inside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

— MITRE

Missing authorization in SiteIsolation in Google Chrome prior to 156.0.8078.47 allowed a remote attacker who had compromised the renderer process to bypass web origin policy via a crafted HTML page. (Chromium security severity: Medium)

— NVD

This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases for more information.

— Microsoft

Credit

Google

Affected Software

8 affected componentsFixes available

Microsoft Edge (Chromium-based)<156.0.4314.42

156.0.4314.42

Google Chrome<156.0.8078.47

Microsoft Edge<156.0.4314.42

156.0.4314.42

Google Chrome<156.0.8078.47

156.0.8078.47

debian/chromium<156.0.8078.47-1~deb12u1

156.0.8078.47-1~deb12u1

debian/chromium<156.0.8078.47-1~deb13u1

156.0.8078.47-1~deb13u1

debian/chromium<156.0.8078.47-1

156.0.8078.47-1

debian/chromium<=150.0.7871.100-1~deb12u1, <=150.0.7871.181-1~deb13u1

156.0.8078.79-1~deb12u1156.0.8078.79-1~deb13u1156.0.8078.79-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 156.0.4314.42
Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 156.0.8078.47
Upgrade
Upgrade debian/chromium to a version that resolves this vulnerability.
Fixed in 156.0.8078.47-1~deb12u1
Upgrade
Upgrade debian/chromium to a version that resolves this vulnerability.
Fixed in 156.0.8078.47-1~deb13u1
Upgrade
Upgrade debian/chromium to a version that resolves this vulnerability.
Fixed in 156.0.8078.47-1
Upgrade
Upgrade debian/chromium to a version that resolves this vulnerability.
Fixed in 156.0.8078.79-1~deb12u1Fixed in 156.0.8078.79-1~deb13u1Fixed in 156.0.8078.79-1
Upgrade
Upgrade Google Chrome to a version that resolves this vulnerability.
Fixed in 156.0.8078.47
Upgrade
Upgrade Microsoft Edge (Chromium-based) to a version that resolves this vulnerability.
Fixed in 156.0.8078.47

Event History

Apr 1, 2026

CVE Published

12:00 AM

Data Sourced

12:00 AM

SeverityWeaknessAffected Software

Oct 20, 2026

CVE Published

via MITRE·09:02 PM

Data Sourced

via MITRE·09:02 PM

DescriptionWeakness

Data Sourced

via NVD·10:19 PM

DescriptionSeverityWeaknessAffected Software

Data Sourced

via OSV·10:19 PM

DescriptionSeverityAffected Software

Oct 23, 2026

Data Sourced

via Microsoft·02:43 AM

DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

Who is exposed to this issue?

Users running Google Chrome versions earlier than 156.0.8078.47 are exposed if they can be induced to load a crafted HTML page. The described impact is potential arbitrary code execution inside the browser sandbox.

What does an attacker need to exploit it?

The attacker needs to provide or cause the target to load a crafted HTML page remotely. The available information does not state that local access, authentication, or a separate vulnerability is required.

How can I determine whether an installation is affected?

Check the installed Google Chrome version. Versions prior to 156.0.8078.47 are affected according to the available advisory information; version 156.0.8078.47 or later is not described as affected.

CVE-2026-113281: Missing authorization in SiteIsolation

Other sources

Credit

Affected Software

Remediation

Event History

Parent advisories

Peer vulnerabilities

Frequently Asked Questions

Who is exposed to this issue?

What does an attacker need to exploit it?

How can I determine whether an installation is affected?

Company

Resources

Contact