CVE-2025-14330CRITICAL 9.8EPSS p33.7%

CVE-2025-14330CVE-2025-14330

Description

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.

Scoring

CVSS 3.19.8 (CRITICAL)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.42% probability of exploitation · percentile 33.7% · 2026-06-18T12:00:27Z
Published2025-12-09
Last modified2026-04-13

Underlying weaknesses· 3

CWE-119CWE-686CWE-843

References

  1. https://bugzilla.mozilla.org/show_bug.cgi?id=1997503
  2. https://www.mozilla.org/security/advisories/mfsa2025-92/
  3. https://www.mozilla.org/security/advisories/mfsa2025-94/
  4. https://www.mozilla.org/security/advisories/mfsa2025-95/
  5. https://www.mozilla.org/security/advisories/mfsa2025-96/

3

TypeTargetConfidenceTier
WeaknessImproper Restriction of Operations within the Bounds of a Memory Buffercwe-1190%live
WeaknessFunction Call With Incorrect Argument Typecwe-6860%live
WeaknessAccess of Resource Using Incompatible Type ('Type Confusion')cwe-8430%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.