PT-2026-102562 · Mozilla · Firefox+1

Mozilla

·

CVE-2026-100788

·

Published

2026-09-29

·

Updated

2026-09-29

CVSS v3.1

9.8

Critical

VectorAV:N/AC:L/PR:N/UI:N/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 Firefox ESR versions prior to 140.17 Thunderbird versions prior to 157
Description An invalid pointer issue exists within the JavaScript: WebAssembly component. WebAssembly is a binary instruction format for a stack-based virtual machine, designed as a portable compilation target for programming languages.
Recommendations Update Firefox to version 157. Update Firefox ESR to version 153.4. Update Firefox ESR to version 140.17. Update Thunderbird to version 157.

Fix

Access of Uninitialized Pointer

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

Weakness Enumeration

CWE-824

Related Identifiers

CVE-2026-100788

Affected Products

Firefox
Thunderbird