Cyber Resilience

CVE-2026-3918

High

Published: 11 March 2026

Published
11 March 2026
Modified
13 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 0.0032 24.2th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-3918 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 24.2th 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-2026-3918 is a use-after-free vulnerability (CWE-416) in the WebMCP component of Google Chrome prior to version 146.0.7680.71. This flaw enables a remote attacker to potentially exploit heap corruption via a crafted HTML page. The issue 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 Chromium security.

A remote attacker can exploit this vulnerability over the network with low attack complexity and no required privileges, though it requires user interaction such as visiting a malicious webpage. Successful exploitation could result in high impacts to confidentiality, integrity, and availability through heap corruption.

Google's stable channel update for Chrome desktop, announced at https://chromereleases.googleblog.com/2026/03/stable-channel-update-for-desktop_10.html, addresses this issue in version 146.0.7680.71 and later. Additional details are available in the Chromium bug tracker at https://issues.chromium.org/issues/483853103.

EU & UK References

Vulnerability details

Use after free in WebMCP in Google Chrome prior to 146.0.7680.71 allowed a remote attacker to potentially exploit heap corruption 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?

Use-after-free vulnerability in Google Chrome exploited via crafted HTML page requiring user interaction to visit a malicious webpage, directly facilitating drive-by compromise (T1189) and exploitation for client execution (T1203).

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

CVEs Like This One

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CVE-2026-7342Same product: Apple Macos
CVE-2026-4680Same 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

Affected Assets

google
chrome
≤ 146.0.7680.71

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

Requires timely patching of the specific use-after-free vulnerability in Chrome's WebMCP component as released in version 146.0.7680.71.

SI-16 Memory Protection good match
prevent

Provides memory boundary protections such as ASLR and DEP that directly mitigate use-after-free heap corruption exploits.

SI-3 Malicious Code Protection partial match
preventdetect

Deploys malicious code protection tools capable of scanning and blocking crafted HTML pages exploiting the WebMCP vulnerability.

References