CVE-2025-14330

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.5% chance of exploitation in the next 30 days; higher than 42% of CVEs (scores of 2026-10-25)

CWEs

CWE-119, CWE-686, CWE-843

Published

2025-12-09

Modified

2026-10-07

Record from

the NVD, synced 2026-10-19

Affected

• mozilla:firefox
• mozilla:thunderbird

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1997503
• https://www.mozilla.org/security/advisories/mfsa2025-92/
• https://www.mozilla.org/security/advisories/mfsa2025-94/
• https://www.mozilla.org/security/advisories/mfsa2025-95/
• https://www.mozilla.org/security/advisories/mfsa2025-96/

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