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Vulnerability IntelligenceCVE-2026-16392

CVE-2026-16392

CRITICAL9.1

JIT miscompilation in the JavaScript Engine: JIT component

Published Jul 21, 2026

Modified 2 months ago

Details

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2044606

https://www.cve.org/CVERecord?id=CVE-2026-16392

https://www.mozilla.org/security/advisories/mfsa2026-68/

https://www.mozilla.org/security/advisories/mfsa2026-71/

CVSS Analysis

CVSS v3.1

9.1

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

HighI:H

Availability

HighA:H

9.1/CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Ecosystems

Timeline

PublishedJul 21, 2026

ModifiedJul 28, 2026

CVE-2026-16392 | Mondoo Vulnerability Intelligence