Synced 15 Oct 2026 20:55 UTC Account

Is Mozilla Firefox 91.13.0 patched?

Mozilla · cycle 91.13 · Official site ↗
91.13.05/100Critical · exploited

Current stable (158.0): 100/100

Minimum safe version157.0.1

91.13.0 has 450 open critical-or-high vulnerabilities. Run 157.0.1 or later to clear them. See what 157.0.1 fixes →

1 of the vulnerability affecting 91.13.0 is linked to ransomware campaigns (CISA KEV) — prioritise patching.
Health score5/100
Open issues581
Exploited now3
Cycle 91.13 EOL—
Latest release158.0

Summary iPlain-English security status for Mozilla Firefox 91.13.0, built from its CVEs, active-exploitation data, end-of-life date and latest release.

Mozilla Firefox 91.13.0 is part of the 91.13 release line. 3 actively-exploited vulnerabilities affect it (CISA KEV). 1 is linked to ransomware campaigns (CISA KEV). 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 91.13.0

Exploited first, then by exploitation probability.

CVE-2024-9680 CRITICAL exploited ransomware EPSS 23% → fixed in 131.0.2 CVE-2022-26485 HIGH exploited EPSS 14% → fixed in 97.3.0 CVE-2022-26486 CRITICAL exploited EPSS 2% → fixed in 97.3.0 CVE-2025-0242 MEDIUM EPSS 13% → fixed in 134.0 CVE-2025-4918 CRITICAL EPSS 9% → fixed in 138.0.4 CVE-2025-0247 CRITICAL EPSS 9% → fixed in 134.0 CVE-2025-4919 HIGH EPSS 9% → fixed in 138.0.4 CVE-2025-0244 MEDIUM EPSS 7% → fixed in 134.0 CVE-2025-6424 CRITICAL EPSS 4% → fixed in 140.0 CVE-2025-6436 HIGH EPSS 4% → fixed in 140.0 CVE-2025-2857 CRITICAL EPSS 2% → fixed in 136.0.4 CVE-2025-1009 CRITICAL EPSS 1% → fixed in 135.0 CVE-2025-3028 MEDIUM EPSS 1% → fixed in 137.0 CVE-2025-0238 MEDIUM EPSS 1% → fixed in 134.0 CVE-2026-4690 HIGH EPSS 1% → fixed in 149.0 CVE-2026-4694 HIGH EPSS 1% → fixed in 149.0 CVE-2026-4698 CRITICAL EPSS 1% → fixed in 149.0 CVE-2025-49710 CRITICAL EPSS 1% → fixed in 139.0.4 CVE-2023-29535 MEDIUM EPSS 1% → fixed in 112.0 CVE-2025-0241 HIGH EPSS 1% → fixed in 134.0

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 151.0.4Mozilla 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 78.15.0

Frequently asked

Is Mozilla Firefox 91.13.0 patched?

No — 3 actively-exploited vulnerabilities affect Mozilla Firefox 91.13.0. Upgrade to at least 157.0.1.

What version should I upgrade Mozilla Firefox 91.13.0 to?

Upgrade Mozilla Firefox 91.13.0 to at least 157.0.1 to clear its 450 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 91.13.0 still receiving security updates?

Yes — the 91.13 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 ↗