CVE-2026-5877
Published: 08 April 2026
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 35.3th 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).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
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.
Ensures organizations receive and implement security advisories from Chromium releases addressing CVE-2026-5877.
Enables vulnerability scanning to identify systems running Google Chrome versions prior to 147.0.7727.55 affected by this flaw.
MITRE ATT&CK Enterprise TechniquesAI
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).
NVD Description
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)
Deeper analysisAI
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.
Details
- CWE(s)