CVE-2026-87499: High severity Google Chrome vulnerability
Chromium CVE-2026-87499: Incorrect authorization in Network
Other sources
Incorrect authorization in Network in Google Chrome prior to 153.0.8010.36 allowed a remote attacker who had compromised the renderer process to bypass site isolation via a crafted HTML page. (Chromium security severity: High)
— 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
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
Chromium-based browsers (Google Chrome / Microsoft Edge)to a version that resolves this vulnerability.Fixed in 153.0.8010.36Patch Chromium CVE-2026-87499
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. They can then use a crafted HTML page to bypass site isolation.
Which Chrome versions need to be updated?
Google Chrome versions earlier than 153.0.8010.36 are affected. Updating to 153.0.8010.36 or later addresses the affected version range.
What security boundary is weakened by this vulnerability?
The issue allows a compromised renderer process to bypass Chrome's site isolation boundary. This could undermine separation between sites after renderer compromise.