Description
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.
Affected products
mozilla: firefox
References6
- www.mozilla.org/security/advisories/mfsa2026-45/ Vendor Advisory
- bugzilla.mozilla.org/show_bug.cgi?id=2036983 Permissions Required
- access.redhat.com/security/cve/CVE-2026-8389
- bugzilla.redhat.com/show_bug.cgi?id=2476466
- github.com/crixpwn/CVE-2026-8389
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8389.…
Metrics
- CVSS 3.1
-
8.8
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 37 · as of 14 November 2026
- CWE
- CWE-119CWE-686CWE-843CWE-733
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