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CVE PROGRAM SOURCE RECORD9.8 Critical

CVE-2026-4701

Use-after-free in the JavaScript Engine component

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
mozilla

Description

Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Mozilla Firefox

  • 140.9 to ≤ 140.*unaffected
  • 149 to ≤ *unaffected

Mozilla Thunderbird

  • 140.9 to ≤ 140.*unaffected
  • 149 to ≤ *unaffected

References