PT-2026-102588 · Mozilla · Thunderbird+2

Mozilla

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CVE-2026-100814

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Published

2026-09-29

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Updated

2026-09-29

CVSS v3.1

8.8

High

VectorAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions Firefox versions prior to 157 Firefox ESR versions prior to 153.4 Thunderbird versions prior to 157
Description Incorrect boundary conditions exist within the JIT (Just-In-Time) component of the JavaScript Engine. JIT is a method of improving program execution speed by compiling code during runtime rather than before execution.
Recommendations Update Firefox to version 157 or later. Update Firefox ESR to version 153.4 or later. Update Thunderbird to version 157 or later.

Fix

Buffer Overflow

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Weakness Enumeration

CWE-119

Related Identifiers

CVE-2026-100814

Affected Products

Firefox
Firefox Esr
Thunderbird