JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 151.0.3.
https://www.mozilla.org/security/advisories/mfsa2026-54/
https://bugzilla.mozilla.org/show_bug.cgi?id=2040903
Source: Mitre, NVD
Published: 2026-06-02
Updated: 2026-06-03
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P
Severity: Medium
Base Score: 4.3
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
EPSS: 0.00018