Sandbox escape in Firefox and Firefox Focus for Android. This vulnerability was fixed in Firefox 151.
CVSS Details
CVSS Score
7.5
Severity
HIGH
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Configurations (Affected Products)
No configuration data available.
Firefox (Android) < 151
Firefox Focus (Android) < 151
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
/**
* Conceptual Proof of Concept (PoC) for CVE-2026-8945
* This script demonstrates the logic flow to trigger the sandbox escape.
* Note: Actual exploit code is obfuscated and complex.
*/
function exploitSandboxEscape() {
console.log("[+] Initializing exploit for CVE-2026-8945...");
// 1. Prepare the malicious payload targeting the vulnerable sandbox interface
// This mimics the specific logic that bypasses the sandbox restriction.
var payload = {
target: "android_sandbox_broker",
action: "escape_sequence",
data: "malicious_instruction_to_break_isolation"
};
try {
// 2. Trigger the vulnerability
// In a real scenario, this would call a specific vulnerable function in Firefox < 151
if (isVulnerableVersion()) {
console.log("[+] Target is vulnerable. Triggering escape...");
// Simulate the execution of code outside the sandbox
executeOutsideSandbox(payload);
console.log("[+] Sandbox escape successful! Accessing system files...");
// Hypothetical command execution after escape
runSystemCommand("whoami");
} else {
console.log("[-] Target is patched or not vulnerable.");
}
} catch (error) {
console.error("[-] Exploit failed: " + error.message);
}
}
// Helper function to simulate vulnerability check
function isVulnerableVersion() {
// Returns true for simulation purposes
return true;
}
// Helper function to simulate sandbox escape logic
function executeOutsideSandbox(data) {
// Logic to interact with the Android OS directly bypassing the sandbox
console.log("[DEBUG] Executing payload outside sandbox: " + JSON.stringify(data));
}
// Helper function to simulate system command execution
function runSystemCommand(cmd) {
console.log("[DEBUG] Running system command: " + cmd);
}
// Execute the exploit
exploitSandboxEscape();