Paper/Archive/CVE-2026-16392

CVE-2026-16392

Mozilla Firefox — JIT miscompilation in the JavaScript Engine: JIT component

EPSS 0.5%CVSS 9.1

critical.is priorityof 100

36

CVSS 9.1 (ADP)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 EPSS percentile 44.9.449 × 209.0 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Affected

ProductAffectedFixed inSource

Firefoxsee advisory153CNA

Thunderbirdsee advisory153CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

refbugzilla.mozilla.org/show_bug.cgi?id=2044606 refmozilla.org/security/advisories/mfsa2026-68 refmozilla.org/security/advisories/mfsa2026-71