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Security Vulnerabilities fixed in Firefox ESR 140.11 — Mozilla

🗓️ 19 May 2026 00:00:00Reported by Mozilla FoundationType 
mozilla
 mozilla
🔗 www.mozilla.org👁 10 Views

Security vulnerabilities fixed in Firefox 140.11; memory safety bugs in 140.10, 150, 115.35 could allow code.

Related
Detection
Refs
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CVE-2026-8946
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CVE-2026-8947
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CVE-2026-8953
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CVE-2026-8401
12 May 202614:24
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Tenable Nessus
Amazon Linux 2023 : firefox (ALAS2023-2026-1793)
8 Jun 202600:00
nessus
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Vulners
Node
mozillafirefoxRange<140.11esr

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19 May 2026 00:00Current
6Medium risk
Vulners AI Score6
CVSS 3.19.8
EPSS0.00583
SSVC
10