KEV Entry

CVE-2024-4367

Known Exploited Vulnerability Entry External Catalog

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Entry Details
Confirmed Exploited

CVE-2024-4367

2026-04-15 14:28 UTC

Timestamps

2026-04-15

2026-04-15

Scope

KEVIntel entry: A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context. This vulnerability... | Affected: Mozilla / Firefox, Firefox ESR, Thunderbird | CVSS: 8.8 (HIGH) | Used in malware: unknown | Not yet in CISA KEV: True

References
  • {'id': 'CVE-2024-4367', 'url': 'https://www.cve.org/CVERecord?id=CVE-2024-4367'}
  • {'id': 'kevintel', 'url': 'https://kevintel.com/vuln/CVE-2024-4367'}

6ee5fcc2-9eb3-4652-bcf3-1203c4346ba6

caeb2787-0d58-4236-9039-7c86c3e566f3

2026-06-19 12:42 UTC

2026-06-19 12:42 UTC

Evidence
1
Type Source Signal Confidence Details GCVE Metadata
public_report kevintel successful_exploitation 0.70
View details 
{
  "added_date": "2026-04-15T14:28:37.394Z",
  "ahead_of_cisa_kev": null,
  "cvss_score": 8.8,
  "cvss_severity": "HIGH",
  "epss_percentile": null,
  "epss_score": null,
  "feed": "KEVIntel (kevintel.com)",
  "not_yet_in_cisa_kev": true,
  "product": "Firefox, Firefox ESR, Thunderbird",
  "title": "A type check was missing when handling fonts in PDF.js, which would allow arbitrary JavaScript execution in the PDF.js context. This vulnerability...",
  "used_in_malware": "unknown",
  "vendor": "Mozilla"
}
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