A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context. This vulnerability affects Firefox < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.
126126115.11115.11Exploitability
AV:NAC:HPR:NUI:NScope
S:UImpact
C:LI:LA:L5.6/CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L