Google Chrome Media cross-origin data leak via crafted HTML page

#!/usr/bin/env python3
# check_chrome_cve_2026_11176.py
# Exit codes: 0=PATCHED, 1=VULNERABLE, 2=UNKNOWN

import os
import platform
import re
import shutil
import subprocess
import sys

FIXED = (149, 0, 7827, 53)
VERSION_RE = re.compile(r'(\d+)\.(\d+)\.(\d+)\.(\d+)')


def parse_version(text):
    m = VERSION_RE.search(text or '')
    if not m:
        return None
    return tuple(int(x) for x in m.groups())


def version_ge(a, b):
    return a >= b


def run_cmd(cmd):
    try:
        p = subprocess.run(cmd, capture_output=True, text=True, timeout=10)
        out = (p.stdout or '') + '\n' + (p.stderr or '')
        return out.strip()
    except Exception:
        return ''


def candidate_commands():
    system = platform.system().lower()
    cmds = []

    if system == 'windows':
        local = os.environ.get('LOCALAPPDATA', '')
        program_files = os.environ.get('ProgramFiles', '')
        program_files_x86 = os.environ.get('ProgramFiles(x86)', '')
        paths = [
            os.path.join(program_files, 'Google', 'Chrome', 'Application', 'chrome.exe'),
            os.path.join(program_files_x86, 'Google', 'Chrome', 'Application', 'chrome.exe'),
            os.path.join(local, 'Google', 'Chrome', 'Application', 'chrome.exe'),
        ]
        for p in paths:
            if p and os.path.exists(p):
                cmds.append([p, '--version'])
        # Registry fallback via PowerShell if chrome.exe is not in standard paths
        cmds.append(['powershell', '-NoProfile', '-Command', "(Get-ItemProperty 'HKLM:\\Software\\Google\\Chrome\\BLBeacon' -ErrorAction SilentlyContinue).version"])
        cmds.append(['powershell', '-NoProfile', '-Command', "(Get-ItemProperty 'HKCU:\\Software\\Google\\Chrome\\BLBeacon' -ErrorAction SilentlyContinue).version"])

    elif system == 'darwin':
        mac_path = '/Applications/Google Chrome.app/Contents/MacOS/Google Chrome'
        if os.path.exists(mac_path):
            cmds.append([mac_path, '--version'])
        for name in ['google-chrome', 'chrome', 'chromium', 'chromium-browser']:
            found = shutil.which(name)
            if found:
                cmds.append([found, '--version'])

    else:
        for name in ['google-chrome', 'google-chrome-stable', 'chromium', 'chromium-browser', 'chrome']:
            found = shutil.which(name)
            if found:
                cmds.append([found, '--version'])
        # Common package-manager fallbacks
        cmds.append(['bash', '-lc', "dpkg-query -W -f='${Version}\n' google-chrome-stable 2>/dev/null || true"])
        cmds.append(['bash', '-lc', "rpm -q --qf '%{VERSION}-%{RELEASE}\n' google-chrome-stable 2>/dev/null || true"])

    return cmds


def main():
    seen = []
    for cmd in candidate_commands():
        out = run_cmd(cmd)
        if not out:
            continue
        ver = parse_version(out)
        if ver:
            seen.append((cmd[0], ver, out.strip()))

    if not seen:
        print('UNKNOWN: Could not determine installed Chrome version')
        sys.exit(2)

    # Choose the highest discovered version if multiple are installed
    seen.sort(key=lambda x: x[1], reverse=True)
    source, ver, raw = seen[0]

    if version_ge(ver, FIXED):
        print(f'PATCHED: detected {ver[0]}.{ver[1]}.{ver[2]}.{ver[3]} via {source}')
        sys.exit(0)
    else:
        print(f'VULNERABLE: detected {ver[0]}.{ver[1]}.{ver[2]}.{ver[3]} via {source}; fixed is 149.0.7827.53 or later')
        sys.exit(1)


if __name__ == '__main__':
    main()