CVE-2026-6297: Critical Use after free in Proxy
Chromium: CVE-2026-6297 Use after free in Proxy
Other sources
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 Proxy in Google Chrome prior to 147.0.7727.101 allowed an attacker in a privileged network position to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Critical)
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Google Chrome / Chromium (Proxy)to a version that resolves this vulnerability.Fixed in 147.0.7727.101 - Compensating control
Because exploitation could allow sandbox escape via a crafted HTML page for an attacker in a privileged network position, restrict/limit access from privileged network positions where possible and monitor for suspicious HTML/page rendering activity until browsers are updated to 147.0.7727.101 or later.
Event History
Peer vulnerabilities
Found alongside the following vulnerabilities.
Frequently Asked Questions
What is the severity of CVE-2026-6297?
CVE-2026-6297 has been classified as a high severity vulnerability due to the potential for use after free issues.
How do I fix CVE-2026-6297?
To resolve CVE-2026-6297, users should update Google Chrome to version 147.0.7727.101 or later.
Which software is affected by CVE-2026-6297?
CVE-2026-6297 affects Google Chrome versions prior to 147.0.7727.101 and Microsoft Edge (Chromium-based) versions up to 147.0.3912.72.
What type of vulnerability is CVE-2026-6297?
CVE-2026-6297 is classified as a use after free vulnerability, which indicates that memory is incorrectly accessed after it has been freed.
Is it safe to continue using Chrome with CVE-2026-6297?
It is not safe to continue using unpatched versions of Chrome vulnerable to CVE-2026-6297, as it poses significant security risks.