Access of Resource Using Incompatible Type ('Type Confusion') Affecting Firefox package, versions [,158)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-FIREFOX-20882926
- published13 Oct 2026
- disclosed13 Oct 2026
- creditUnknown
Introduced: 13 Oct 2026
NewCVE-2026-109720 (opens in a new tab)How to fix?
Upgrade Firefox to version 158 or higher.
Overview
Affected versions of this package are vulnerable to Access of Resource Using Incompatible Type ('Type Confusion') through the WebAssembly component in the JavaScript engine. An attacker can execute arbitrary code or cause unexpected behavior by exploiting incorrect code generation during just-in-time compilation.