CVE-2026-8389

JIT miscompilation in the JavaScript Engine: JIT component

State: Published
Severity: 8.8 High
Published: May 12, 2026
Updated: Jul 15, 2026
Reserved: May 12, 2026

Description

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CISA-ADP
3.1	7.5 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H	redhat-SADP

Weaknesses

CWE-686 Function Call With Incorrect Argument Type
CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-733 Compiler Optimization Removal or Modification of Security-critical Code

Affected Products

Product	Versions
FirefoxMozilla	150.0.3 and laterNot affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.