CVE-2026-5874

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)

CVSS Details

CVSS Score

9.6

Severity

CRITICAL

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Configurations (Affected Products)

cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* - NOT VULNERABLE

cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* - NOT VULNERABLE

Google Chrome < 147.0.7727.55

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

<!--
PoC for CVE-2026-5874 (Conceptual)
Target: Google Chrome < 147.0.7727.55
Vulnerability: Use after free in PrivateAI
-->
<html>
<head>
    <title>CVE-2026-5874 PoC</title>
</head>
<body>
<script>
    // Simulating the trigger for PrivateAI UAF
    // Note: Actual exploitation requires specific memory layout and UI gestures

    function trigger_vulnerability() {
        // Step 1: Create object in vulnerable component
        let vulnerable_obj = document.createElement('div'); // Placeholder for PrivateAI object allocation

        // Step 2: Trigger free operation (simulated)
        vulnerable_obj.remove(); 
        
        // Step 3: Use-after-free
        // Attacker attempts to access the freed memory to corrupt vtable or data
        // In a real scenario, this would involve heap grooming and spray
        try {
            console.log(vulnerable_obj.innerHTML); // Accessing freed object
        } catch (e) {
            console.log("Potential crash detected.");
        }
    }

    // Trigger on load or specific user action
    window.onload = function() {
        alert("To exploit this, user interaction (UI gestures) is required as per CVE description.");
        trigger_vulnerability();
    };
</script>
<h1>CVE-2026-5874 Test Page</h1>
<p>This page attempts to trigger the UAF in PrivateAI.</p>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-5874
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-5874
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-5874/
[4] VulDB https://vuldb.com/cve/CVE-2026-5874
[5] https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/485397279

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-5874", "sourceIdentifier": "[email protected]", "published": "2026-04-08T22:16:27.003", "lastModified": "2026-04-13T17:57:38.287", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "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)"}], "metrics": {"cvssMetricV31": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-416"}]}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-416"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "147.0.7727.55", "matchCriteriaId": "9A68673A-1331-48AF-8860-53064F0AF310"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}, {"vulnerable": false, "criteria": "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*", "matchCriteriaId": "703AF700-7A70-47E2-BC3A-7FD03B3CA9C1"}, {"vulnerable": false, "criteria": "cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*", "matchCriteriaId": "A2572D17-1DE6-457B-99CC-64AFD54487EA"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2026/04/stable-channel-update-for-desktop.html", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/485397279", "source": "[email protected]", "tags": ["Permissions Required"]}]}}