PT-2026-61904 · Mozilla · Firefox+1

Gary Kwong

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CVE-2026-16392

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Published

2026-07-21

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Updated

2026-08-31

CVSS v3.1

9.1

Critical

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153
Description A JIT miscompilation issue exists within the JIT component of the JavaScript Engine. JIT (Just-In-Time) compilation is a method used by the engine to improve performance by compiling code during execution rather than before.
Recommendations Update Firefox to version 153. Update Thunderbird to version 153.

Fix

Type Confusion

Found an issue in the description? Have something to add? Feel free to write us 👾
dbugs@ptsecurity.com

Weakness Enumeration

CWE-670CWE-843

Related Identifiers

CVE-2026-16392
OPENSUSE-SU-2026:11358-1
OPENSUSE-SU-2026:11373-1
OPENSUSE-SU-2026:21713-1
SUSE-SU-2026:23411-1

Affected Products

Firefox
Thunderbird