CVE-2026-4698

Critical

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR…

mozilla·CWE-843·Published 2026-03-24

CVSS

9.8

EPSS

0.01

KEV

Exploits

Vendor statements (25)

cve.orgen

183 chars

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

NVDes

201 chars

Miscompilación JIT en el motor JavaScript: Componente JIT. Esta vulnerabilidad afecta a Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149 y Thunderbird < 140.9.

CVSS metrics across sources

Version	Type	Source	Base	Exp	Impact	Vector
3.1	Primary	NVD	9.8	3.9	5.9	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1	Primary	cve.org	8.8	—	—	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1	Primary	cve.org	8.8	—	—	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1	Primary	cve.org	8.8	—	—	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1	Primary	cve.org	8.8	—	—	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1	Primary	cve.org	8.8	—	—	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1	Primary	cve.org	8.8	—	—	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1	Primary	cve.org	7.5	—	—	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1	Primary	cve.org	7.5	—	—	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1	Primary	cve.org	7.5	—	—	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1	Primary	cve.org	7.5	—	—	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1	Secondary	NVD	8.8	2.8	5.9	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
3.1	Secondary	NVD	7.5	1.6	5.9	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H