CVE-2025-14330

CRITICALNVD 9.89.8—

9.8

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 v3: 9.8
EG Score: 9.8(medium)
EPSS: 24.3%
KEV: Not listed

Published

December 9, 2025

Last Modified

April 13, 2026

Advisory Details (5)

Auto-updated May 19, 2026

No patch confirmed yet.

generic

Security Vulnerabilities fixed in Thunderbird 140.6 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2025-96/

generic

Security Vulnerabilities fixed in Thunderbird 146 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2025-95/

generic

Security Vulnerabilities fixed in Firefox ESR 140.6 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2025-94/

generic

Security Vulnerabilities fixed in Firefox 146 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2025-92/

generic

Access Denied

https://bugzilla.mozilla.org/show_bug.cgi?id=1997503

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-02 02:09 UTCOSV refresh
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-27 13:40 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch
2026-05-26 13:43 UTCepss_batch

Frequently asked(5)

What is CVE-2025-14330?

CVE-2025-14330 is a critical vulnerability published on December 9, 2025. 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.

When was CVE-2025-14330 disclosed?

CVE-2025-14330 was first published in the National Vulnerability Database on December 9, 2025, with the most recent update on April 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-14330 actively exploited?

CVE-2025-14330 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 24.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-14330?

CVE-2025-14330 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2025-14330?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-14330, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2025-14330

Published

Last Modified

Advisory Details (5)

Security Vulnerabilities fixed in Thunderbird 140.6 — Mozilla

Security Vulnerabilities fixed in Thunderbird 146 — Mozilla

Security Vulnerabilities fixed in Firefox ESR 140.6 — Mozilla

Security Vulnerabilities fixed in Firefox 146 — Mozilla

Access Denied

Weakness Classification(3)

Data Freshness Timeline

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-14330?

Same vendor

Same CWE

CVE-2025-14330

📅 Published

🔄 Last Modified

📋 Advisory Details (5)

Security Vulnerabilities fixed in Thunderbird 140.6 — Mozilla

Security Vulnerabilities fixed in Thunderbird 146 — Mozilla

Security Vulnerabilities fixed in Firefox ESR 140.6 — Mozilla

Security Vulnerabilities fixed in Firefox 146 — Mozilla

Access Denied

Weakness Classification(3)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-14330?

🔗 Related CVEs(same vendor + same CWE)

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Published

Last Modified

Advisory Details (5)

Frequently asked(5)

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