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Is Mozilla Firefox 151.0.4 patched?

Mozilla · cycle 151.0 · Official site ↗
151.0.45/100Critical

Current stable (158.0): 100/100

Minimum safe version157.0.1

151.0.4 has 233 open critical-or-high vulnerabilities. Run 157.0.1 or later to clear them. See what 157.0.1 fixes →

Health score5/100
Open issues289
Exploited now0
Cycle 151.0 EOL—
Latest release158.0

Summary iPlain-English security status for Mozilla Firefox 151.0.4, built from its CVEs, active-exploitation data, end-of-life date and latest release.

Mozilla Firefox 151.0.4 is part of the 151.0 release line. 289 known vulnerabilities affect it. The minimum safe version is 157.0.1 — upgrade to it or later to clear the open critical/high issues. The latest supported Mozilla Firefox release is 158.0.

Known issues affecting 151.0.4

Exploited first, then by exploitation probability.

CVE-2026-74943 CRITICAL EPSS 1% → fixed in 153.1.0 CVE-2026-92036 CRITICAL EPSS 1% → fixed in 156.0.0 CVE-2026-92037 CRITICAL EPSS 1% → fixed in 156.0.0 CVE-2026-92061 CRITICAL EPSS 1% → fixed in 156.0.0 CVE-2026-92066 CRITICAL EPSS 1% → fixed in 156.0.0 CVE-2026-92051 CRITICAL EPSS 1% → fixed in 156.0.0 CVE-2026-74990 CRITICAL EPSS 1% → fixed in 153.1.0 CVE-2026-74987 CRITICAL EPSS 1% → fixed in 153.1.0 CVE-2026-12328 HIGH EPSS 0% → fixed in 152.0 CVE-2026-92040 HIGH EPSS 0% → fixed in 156.0.0 CVE-2026-74945 MEDIUM EPSS 0% → fixed in 153.1.0 CVE-2026-92050 CRITICAL EPSS 0% → fixed in 156.0.0 CVE-2026-16377 CRITICAL EPSS 0% → fixed in 153.0.0 CVE-2026-16383 CRITICAL EPSS 0% → fixed in 153.0.0 CVE-2026-16350 CRITICAL EPSS 0% → fixed in 153.0.0 CVE-2026-16353 CRITICAL EPSS 0% → fixed in 153.0.0 CVE-2026-16355 CRITICAL EPSS 0% → fixed in 153.0.0 CVE-2026-16357 CRITICAL EPSS 0% → fixed in 153.0.0 CVE-2026-16382 CRITICAL EPSS 0% → fixed in 153.0.0 CVE-2026-16389 CRITICAL EPSS 0% → fixed in 153.0.0

Other Mozilla Firefox versions

Check another release line of Mozilla Firefox.

Mozilla Firefox 158.0Mozilla Firefox 157.0.1Mozilla Firefox 156.0.1Mozilla Firefox 155.0.1Mozilla Firefox 154.0.1Mozilla Firefox 153.5.0Mozilla Firefox 152.0.6Mozilla Firefox 150.0.3Mozilla Firefox 149.0.2Mozilla Firefox 148.0.2Mozilla Firefox 147.0.4Mozilla Firefox 146.0.1Mozilla Firefox 145.0.2Mozilla Firefox 144.0.2Mozilla Firefox 143.0.4Mozilla Firefox 142.0.1Mozilla Firefox 141.0.3Mozilla Firefox 140.17.0Mozilla Firefox 139.0.4Mozilla Firefox 138.0.4Mozilla Firefox 137.0.2Mozilla Firefox 136.0.4Mozilla Firefox 135.0.1Mozilla Firefox 134.0.2Mozilla Firefox 133.0.3Mozilla Firefox 132.0.2Mozilla Firefox 131.0.3Mozilla Firefox 130.0.1Mozilla Firefox 129.0.2Mozilla Firefox 128.14.0Mozilla Firefox 127.0.2Mozilla Firefox 126.0.1Mozilla Firefox 125.0.3Mozilla Firefox 124.0.2Mozilla Firefox 123.0.1Mozilla Firefox 122.0.1Mozilla Firefox 121.0.1Mozilla Firefox 120.0.1Mozilla Firefox 119.0.1Mozilla Firefox 118.0.2Mozilla Firefox 117.0.1Mozilla Firefox 116.0.3Mozilla Firefox 115.38.0Mozilla Firefox 114.0.2Mozilla Firefox 113.0.2Mozilla Firefox 112.0.2Mozilla Firefox 111.0.1Mozilla Firefox 110.0.1Mozilla Firefox 109.0.1Mozilla Firefox 108.0.2Mozilla Firefox 107.0.1Mozilla Firefox 106.0.5Mozilla Firefox 105.0.3Mozilla Firefox 104.0.2Mozilla Firefox 103.0.2Mozilla Firefox 102.15.1Mozilla Firefox 91.13.0Mozilla Firefox 78.15.0

Frequently asked

Is Mozilla Firefox 151.0.4 patched?

Mozilla Firefox 151.0.4 has 233 open critical-or-high vulnerabilities. The minimum safe version is 157.0.1 — upgrade to 157.0.1 or later to clear them.

What version should I upgrade Mozilla Firefox 151.0.4 to?

Upgrade Mozilla Firefox 151.0.4 to at least 157.0.1 to clear its 233 open critical-or-high vulnerabilities.

What is the latest version of Mozilla Firefox?

The latest supported Mozilla Firefox release is 158.0.

Is Mozilla Firefox 151.0.4 still receiving security updates?

Yes — the 151.0 line is still supported and receiving security updates. The latest release is 158.0.

Informational only, from public data (NVD · CISA KEV · EPSS · endoflife.date), and can lag or miss vendor-specific fixes. Always confirm against Mozilla's official advisory before you patch or upgrade — Mozilla Firefox official site ↗