CVE-2026-12321EPSS p5.5%

CVE-2026-12321CVE-2026-12321

mozilla / firefox

Description

JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

Scoring

CVSS 5.4 ()
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
EPSS0.16% probability of exploitation · percentile 5.5% · 2026-08-03T12:00:16Z
Last modified2026-06-16
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.