CVE-2026-91734: High severity Google Google Chrome vulnerability
Chromium CVE-2026-91734: Incorrect authorization
Other sources
Incorrect authorization in Core in Google Chrome on on Windows prior to 153.0.8010.47 allowed a local attacker to execute arbitrary code outside the sandbox via a local program. (Chromium security severity: High)
— MITRE
This CVE was assigned by Chrome. Microsoft Edge (Chromium-based) ingests Chromium, which addresses this vulnerability. Please see Google Chrome Releases](https://chromereleases.googleblog.com/2026)) 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 153.0.4234.46 - Upgrade
Upgrade
Chromium / Google Chrome (Core)to a version that resolves this vulnerability.Fixed in 153.0.8010.47 - Upgrade
Upgrade
Microsoft Edge (Chromium-based)to a version that resolves this vulnerability.Fixed in 153.0.8010.47
Event History
Frequently Asked Questions
Who is exposed to this vulnerability?
The issue affects Google Chrome on Windows before version 153.0.8010.47. Exploitation requires a local attacker and a local program.
What level of access does an attacker need?
An attacker must already be able to run a program locally on the affected Windows system. The vulnerability can then allow arbitrary code execution outside Chrome's sandbox.
What version resolves the issue?
Update Google Chrome on Windows to version 153.0.8010.47 or later.