JIT miscompilation in the JavaScript Engine: JIT component
43Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 8.8epss 0.3%
exploitation probability
0.3%top 74% of all CVEs
observed exploitation
nono source reports it
1 public exploit(s)
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products
Mozilla · Firefoxpublic PoCs found — 1
cve_referencegithub.com/crixpwn/CVE-2026-8389★ 40⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://access.redhat.com/security/cve/CVE-2026-8389https://bugzilla.mozilla.org/show_bug.cgi?id=2036983https://bugzilla.redhat.com/show_bug.cgi?id=2476466https://github.com/crixpwn/CVE-2026-8389https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8389.jsonhttps://www.mozilla.org/security/advisories/mfsa2026-45/