Cyber Resilience

CVE-2026-6297

High

Published: 15 April 2026

Published
15 April 2026
Modified
27 May 2026
KEV Added
—
Patch
—
CVSS Score v3.1 8.3 CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS Score 0.0020 10.0th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-6297 is a high-severity Use After Free (CWE-416) vulnerability in Google Chrome. Its CVSS base score is 8.3 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Drive-by Compromise (T1189); ranked at the 10.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-16 (Memory Protection) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2026-6297 is a use-after-free vulnerability (CWE-416) in the Proxy component of Google Chrome prior to version 147.0.7727.101. Published on 2026-04-15, it carries a CVSS v3.1 base score of 8.3 (AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H) and is classified as Critical severity by Chromium security.

The vulnerability can be exploited by an attacker in a privileged network position using a crafted HTML page, which requires user interaction such as visiting a malicious site. Successful exploitation enables potential sandbox escape, granting high-impact privileges with changed scope that affect confidentiality, integrity, and availability.

Google Chrome version 147.0.7727.101 addresses the issue. Additional details are available in the Chrome stable channel update at https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop_15.html and the Chromium issue tracker at https://issues.chromium.org/issues/493628982.

EU & UK References

Vulnerability details

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)

CWE(s)
CWE-416

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1189 Drive-by Compromise Initial Access
Adversaries may gain access to a system through a user visiting a website over the normal course of browsing.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
Why these techniques?

Use-after-free in Chrome Proxy enables drive-by compromise via crafted HTML on malicious site (T1189), client-side code execution (T1203), and sandbox escape for privilege escalation (T1068).

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0

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Affected Assets

google
chrome
≤ 147.0.7727.101

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

Directly mitigates the use-after-free vulnerability by requiring timely remediation through patching Chrome to version 147.0.7727.101 or later.

SI-16 Memory Protection good match
prevent

Implements memory protections like ASLR and DEP that directly counter exploitation of use-after-free errors in the Chrome Proxy component.

SC-39 Process Isolation partial match
prevent

Enhances process isolation and sandboxing to limit the scope and impact of potential sandbox escapes triggered by the vulnerability.

References