PT-2026-102570 · Mozilla · Firefox+1

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CVE-2026-100796

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Published

2026-09-29

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Updated

2026-09-30

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 Thunderbird versions prior to 157
Description A use-after-free issue exists in the JavaScript: WebAssembly component. Use-after-free is a memory corruption flaw that occurs when an application continues to use a pointer after it has been freed.
Recommendations Update Firefox to version 157 or later. Update Thunderbird to version 157 or later.

Fix

Use After Free

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Weakness Enumeration

Related Identifiers

CVE-2026-100796

Affected Products

Firefox
Thunderbird