Cyber Resilience

CVE-2026-5877

High

Published: 08 April 2026

Published
08 April 2026
Modified
14 April 2026
KEV Added
—
Patch
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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 0.0030 21.8th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-5877 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 21.8th 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-2 (Flaw Remediation) and SI-5 (Security Alerts, Advisories, and Directives).

Deeper analysis

CVE-2026-5877 is a use-after-free vulnerability (CWE-416) in the Navigation component of Google Chrome versions prior to 147.0.7727.55. It affects the browser's rendering engine, stemming from Chromium, and was published on 2026-04-08 with 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), classified as medium severity by Chromium security.

A remote attacker can exploit this vulnerability by tricking a user into visiting a crafted HTML page, leading to arbitrary code execution inside the browser's sandbox. The attack requires user interaction, such as clicking a link or loading a malicious site, but no special privileges, enabling potential high-impact compromise of confidentiality, integrity, and availability within the sandboxed environment.

Mitigation is addressed in the Chrome stable channel update, with the fix included in version 147.0.7727.55 and later, as detailed in the Chrome Releases blog at https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop.html and the Chromium issue tracker at https://issues.chromium.org/issues/333024273. Security practitioners should prioritize updating affected Chrome installations.

EU & UK References

Vulnerability details

Use after free in Navigation in Google Chrome prior to 147.0.7727.55 allowed a remote attacker to execute arbitrary code inside a sandbox via a crafted HTML page. (Chromium security severity: Medium)

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 exploited via crafted HTML page for sandboxed RCE with user interaction maps directly to Drive-by Compromise (T1189) and Exploitation for Client Execution (T1203).

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-2026-4680Same 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
≤ 147.0.7727.55

Mitigating Controls

Mitigating Controls (NIST 800-53 r5) AI

SI-2 Flaw Remediation good match
prevent

Directly requires timely remediation of the use-after-free vulnerability in Google Chrome's Navigation component by patching to version 147.0.7727.55 or later.

SI-5 Security Alerts, Advisories, and Directives good match
prevent

Ensures organizations receive and implement security advisories from Chromium releases addressing CVE-2026-5877.

RA-5 Vulnerability Monitoring and Scanning partial match
detect

Enables vulnerability scanning to identify systems running Google Chrome versions prior to 147.0.7727.55 affected by this flaw.

References