Cyber Posture

CVE-2026-5874

Critical

Published: 08 April 2026

Published
08 April 2026
Modified
13 April 2026
KEV Added
—
Patch
—
CVSS Score 9.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
EPSS Score 0.0012 30.1th percentile
Risk Priority 19 60% EPSS · 20% KEV · 20% CVSS

Description

Use after free in PrivateAI in Google Chrome prior to 147.0.7727.55 allowed a remote attacker who convinced a user to engage in specific UI gestures to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: Medium)

Mitigating Controls (NIST 800-53 r5)AI

SI-2 Flaw Remediation good match
prevent

Requires timely identification, reporting, and remediation of flaws like this use-after-free vulnerability through patching Chrome to version 147.0.7727.55 or later.

SI-16 Memory Protection good match
prevent

Implements memory protection safeguards such as ASLR and DEP to directly mitigate use-after-free exploits that could lead to sandbox escape.

SC-39 Process Isolation partial match
prevent

Enforces process isolation via sandboxing to limit the scope and impact of vulnerabilities like this PrivateAI sandbox escape attempt.

Security SummaryAI

CVE-2026-5874 is a use-after-free vulnerability (CWE-416) in the PrivateAI component of Google Chrome prior to version 147.0.7727.55. Published on 2026-04-08, it carries a CVSS v3.1 base score of 9.6 (AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H) and is classified as Medium severity by Chromium security.

A remote attacker can exploit this vulnerability by convincing a user to engage in specific UI gestures while visiting a crafted HTML page, potentially achieving a sandbox escape with high confidentiality, integrity, and availability impacts due to the elevated scope.

Mitigation is available via the stable channel update to Google Chrome 147.0.7727.55 or 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/485397279. Security practitioners should prioritize updating affected browsers.

Details

CWE(s)
CWE-416

Affected Products

google
chrome
≤ 147.0.7727.55

MITRE ATT&CK Enterprise TechniquesAI

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 vulnerability exploited via crafted HTML page with user UI interaction enables arbitrary code execution in client browser (T1203: Exploitation for Client Execution). Leads to sandbox escape, facilitating privilege escalation via exploitation (T1068: Exploitation for Privilege Escalation).

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

References