Use-after-free in the DOM: Core & HTML component. This vulnerability affects Firefox < 148 and Thunderbird < 148.

Published: 2026-02-24

CVSS: 9.8

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Download CVE-2026-2799 POC (Proof-of-Concept) here:

Tip: Download official Tor Browser at https://www.torproject.org/download/ to access .onion links.

Check our portfolio:

https://dnacompany.com/poc-129-cve-2026-25725/

https://dnacompany.com/poc-783-cve-2025-14532/

https://dnacompany.com/poc-350-cve-2026-2329/

https://dnacompany.com/poc-107-cve-2025-68723/