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CVE-2026-4698 JIT miscompilation in the JavaScript Engine: JIT component

🗓️ 24 Mar 2026 12:30:27Reported by mozillaType 
vulnrichment
 vulnrichment🔗 github.com👁 5 Views

CVE 2026-4698 causes JavaScript engine JIT miscompilation; affects Firefox <149, ESR <115.34 and <140.9, and Thunderbird <149 and <140.9.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
freebsd
FreeBSD		Mozilla -- Multiple vulnerabilities
24 Mar 202600:00
–freebsd
attackerkb
ATTACKERKB		CVE-2026-4698
24 Mar 202612:30
–attackerkb
nessus
Tenable Nessus		Amazon Linux 2023 : firefox (ALAS2023-2026-1554)
13 Apr 202600:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2 : thunderbird, --advisory ALAS2-2026-3241 (ALAS-2026-3241)
14 Apr 202600:00
–nessus
nessus
Tenable Nessus		Amazon Linux 2 : firefox, --advisory ALAS2FIREFOX-2026-056 (ALASFIREFOX-2026-056)
14 Apr 202600:00
–nessus
nessus
Tenable Nessus		AlmaLinux 9 : firefox (ALSA-2026:5930)
30 Mar 202600:00
–nessus
nessus
Tenable Nessus		AlmaLinux 10 : firefox (ALSA-2026:5931)
30 Mar 202600:00
–nessus
nessus
Tenable Nessus		AlmaLinux 8 : firefox (ALSA-2026:5932)
30 Mar 202600:00
–nessus
nessus
Tenable Nessus		AlmaLinux 9 : thunderbird (ALSA-2026:6188)
3 Apr 202600:00
–nessus
nessus
Tenable Nessus		AlmaLinux 10 : thunderbird (ALSA-2026:6342)
1 Apr 202600:00
–nessus
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13 Apr 2026 13:50Current
7.2High risk
Vulners AI Score7.2
EPSS0.00755
SSVC
javascript enginejit miscompilationfirefox versionsthunderbird versions
5