Name: CVE-2026-100792: Access of Resource Using Incompatible Type
Creator: Rapid7
Published: 2026-09-29T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-100792, CWE-843, CVSS 7.1, EPSS 0.00279

JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17.

CVSS Details

CVSS 3.1 Base Score: 7.1
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Amazon_linux_2023	—	Upgrade firefox-debugsourceUpgrade firefoxUpgrade firefox-debuginfo	Oct 13, 2026	Sep 29, 2026
Debian	—	Upgrade firefox-esrUpgrade thunderbird	Oct 1, 2026	Sep 29, 2026
Mfsa2026 100	—	Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 153.4	Sep 29, 2026	Sep 29, 2026
Mfsa2026 97	—	Upgrade to Mozilla Firefox version 157.0Upgrade to the latest version of Mozilla Firefox	Sep 29, 2026	Sep 29, 2026
Mfsa2026 99	—	Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.17	Sep 29, 2026	Sep 29, 2026
Mozilla Thunderbird	—	Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 153.4	Sep 30, 2026	Sep 30, 2026

Prioritise with Active Threat Intelligence

With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.

Explore Intelligence Hub

MDR Buyer's Guide

Global Threat Landscape Report

Grow your business

CVSS Details

Covered by Rapid7

Prioritise with Active Threat Intelligence