Weakness (CWE)

CWE-686: Function Call With Incorrect Argument Type

Variant Draft

The product calls a function, procedure, or routine, but the caller specifies an argument that is the wrong data type, which may lead to resultant weaknesses.

Source: MITRE CWE-686

All Critical High Medium Low Exploited only Public exploit

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High 8.8

CVE-2026-8389 Public exploit

JIT miscompilation in the JavaScript Engine: JIT component

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.

Mozilla Firefox thunderbird mozjs38 Browsers Ubuntu

May 12, 2026

CWE-686: Function Call With Incorrect Argument Type

JIT miscompilation in the JavaScript Engine: JIT component