CVE-2026-40446

Vulnerability

Overview

CVE-2026-40446 is a type confusion vulnerability in the Samsung Open Source Escargot JavaScript engine. The issue arises from accessing a resource using an incompatible type, leading to pointer manipulation. The vulnerability affects Escargot at commit 97e8115ab1110bc502b4b5e4a0c689a71520d335 [1].

Exploitation

An attacker can exploit this vulnerability by crafting malicious JavaScript code that triggers the type confusion. Since Escargot is a JavaScript engine used in various applications, including web browsers, the attack surface is broad. Exploitation likely requires no authentication, as the malicious code could be delivered via a web page or other untrusted input. The attacker must convince a user to execute the crafted script, but no special privileges are needed [1].

Impact

Successful exploitation allows an attacker to manipulate pointers, which can lead to memory corruption. This could potentially enable arbitrary code execution, data leakage, or denial of service. The severity is rated as Medium (CVSS 6.9), indicating a significant but not critical risk [1].

Mitigation

The vulnerability has been addressed in a pull request (#1554) that fixes minor issues in the Escargot codebase. Users are advised to update to the latest version of Escargot that includes this fix. No workarounds are documented, so applying the patch is the recommended course of action [1].