VDB

CVE-2026-6754

CVE-2026-6754 PUBLISHED CVSS 9.300000190734863 CRITICAL

Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10.

EPSS 0.05% · 16.6th percentile

Risk Scores

CVSS v4.0
9.300000190734863
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS Score
0.05%
16.6th percentile

Affected Products

VendorProductVersions
MozillaFirefox140.10, 150, 115.35
MozillaThunderbird140.10, 150

Timeline

  • Apr 21, 2026 CVE Published
  • Apr 22, 2026 EPSS Score
  • Apr 22, 2026 Security Advisory
  • Apr 27, 2026 Distribution Patch
  • Apr 27, 2026 Security Advisory
  • Apr 27, 2026 Distribution Patch
  • Apr 27, 2026 Security Advisory
  • Apr 27, 2026 Distribution Patch
  • Apr 27, 2026 Security Advisory
  • Apr 28, 2026 Distribution Patch
  • Apr 28, 2026 Distribution Patch
  • Apr 30, 2026 Distribution Patch
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