CVE-2026-113261: Improper input validation in WebAppInstalls

Q: Which Chrome installations need to be remediated?

Google Chrome versions earlier than 156.0.8078.47 are affected. Installations running 156.0.8078.47 or later are not identified as affected by the provided data.

Q: What must an attacker do to exploit this issue?

The attacker needs to deliver a crafted HTML page to the target. The issue is described as remotely exploitable and could potentially allow code execution outside the sandbox.

Q: How can I determine whether a system is exposed?

Check the installed Google Chrome version. Systems with a version lower than 156.0.8078.47 should be treated as exposed and updated.

Published May 21, 2026

Updated

Chromium CVE-2026-113261: Use after free

Other sources

Improper input validation in WebAppInstalls in Google Chrome prior to 156.0.8078.47 allowed a remote attacker leveraging social engineering to bypass system access restrictions 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

Use after free in WebAppInstalls in Google Chrome prior to 156.0.8078.47 allowed a remote attacker to potentially execute arbitrary code outside the sandbox via a crafted HTML page. (Chromium security severity: Medium)

— NVD

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

May 21, 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·02:41 AM

DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

Which Chrome installations need to be remediated?

Google Chrome versions earlier than 156.0.8078.47 are affected. Installations running 156.0.8078.47 or later are not identified as affected by the provided data.

What must an attacker do to exploit this issue?

The attacker needs to deliver a crafted HTML page to the target. The issue is described as remotely exploitable and could potentially allow code execution outside the sandbox.

How can I determine whether a system is exposed?

Check the installed Google Chrome version. Systems with a version lower than 156.0.8078.47 should be treated as exposed and updated.

CVE-2026-113261: Improper input validation in WebAppInstalls

Other sources

Credit

Affected Software

Remediation

Event History

Parent advisories

Peer vulnerabilities

Frequently Asked Questions

Which Chrome installations need to be remediated?

What must an attacker do to exploit this issue?

How can I determine whether a system is exposed?

Company

Resources

Contact