Cyber Resilience

CVE-2026-4680

High

Published: 24 March 2026

Published
24 March 2026
Modified
24 March 2026
KEV Added
—
Patch
—
CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.0042 33.5th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-4680 is a high-severity Use After Free (CWE-416) vulnerability in Google Chrome. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Drive-by Compromise (T1189); ranked at the 33.5th 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 RA-5 (Vulnerability Monitoring and Scanning) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2026-4680 is a use-after-free vulnerability (CWE-416) in the FedCM component of Google Chrome prior to version 146.0.7680.165. Published on 2026-03-24, it carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H) and is rated High severity by the Chromium security team.

A remote attacker can exploit this issue via a crafted HTML page, leading to arbitrary code execution inside the browser's sandbox. Exploitation requires user interaction, such as visiting the malicious page, but no privileges or special access are needed.

Google's Chrome Releases blog announces a stable channel update for desktop that addresses this vulnerability (https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_23.html). Additional details are available in the Chromium issue tracker (https://issues.chromium.org/issues/491869946). Security practitioners should ensure Chrome is updated to 146.0.7680.165 or later.

EU & UK References

Vulnerability details

Use after free in FedCM in Google Chrome prior to 146.0.7680.165 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: High)

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 →
Why these techniques?

The vulnerability is exploited via a crafted HTML page in Google Chrome, enabling drive-by compromise (T1189) and exploitation for client execution (T1203) through arbitrary code execution in the browser sandbox upon user visit.

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

CVEs Like This One

CVE-2026-7357Same product: Apple Macos
CVE-2026-7342Same product: Apple Macos
CVE-2026-7355Same product: Apple Macos
CVE-2026-5284Same product: Apple Macos
CVE-2026-9992Same product: Apple Macos
CVE-2026-9118Same product: Apple Macos
CVE-2026-7336Same product: Apple Macos
CVE-2026-7974Same product: Apple Macos
CVE-2026-7352Same product: Apple Macos
CVE-2026-8521Same product: Apple Macos

Affected Assets

google
chrome
≤ 146.0.7680.164

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

Mandates timely identification, reporting, testing, and installation of patches to remediate the use-after-free vulnerability in Chrome's FedCM component as provided in version 146.0.7680.165.

SI-16 Memory Protection partial match
prevent

Implements memory protection techniques such as address space layout randomization and data execution prevention to mitigate use-after-free exploits like CVE-2026-4680.

RA-5 Vulnerability Monitoring and Scanning good match
detect

Requires vulnerability scanning to identify systems running vulnerable Chrome versions prior to 146.0.7680.165 affected by the FedCM use-after-free.

References