CVE-2026-87580: Medium severity Google Chrome vulnerability
Chromium CVE-2026-87580: Incorrect authorization in WebAppInstalls
Other sources
Incorrect authorization in WebAppInstalls in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process and leveraged social engineering to bypass site isolation via a crafted HTML page. (Chromium security severity: Medium)
— MITRE
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
Affected Software
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 153.0.4234.32 - Upgrade
Upgrade
Google Chrome/Chromium (WebAppInstalls)to a version that resolves this vulnerability.Fixed in 153.0.8010.36
Event History
Frequently Asked Questions
What must an attacker achieve before this issue can be exploited?
The attacker must first compromise the Chrome renderer process, then use social engineering to get the user to interact with a crafted HTML page. The issue is not described as exploitable solely by visiting an arbitrary page.
Which Chrome versions should be remediated?
Google Chrome versions prior to 153.0.8010.36 are affected. Update Chrome to 153.0.8010.36 or later.
What security boundary can this vulnerability weaken?
A successful exploit can bypass Chrome site isolation. This could allow a compromised renderer process to cross an intended isolation boundary.