CVE-2026-84134

CriticalCVSS 9.8/10Last modified Sep 3, 2026

Description

Other issue in the Profile Backup component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-200

Affected software

No affected versions have been published.

Timeline

Published
Sep 1, 2026
Last modified
Sep 3, 2026
NVD status
Analyzed

Related CVEs from 2026

CVE-2026-841359.8Other issue in Firefox Focus for Android. This vulnerability was fixed in Firefox 155.CVE-2026-841366.1Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and ThunderbiCVE-2026-841374.3Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and ThundCVE-2026-841386.5Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 155 and Thunderbird 155.CVE-2026-841396.1Clickjacking issue in the DOM: Events component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and ThundeCVE-2026-84148.8Concrete CMS 9 before 9.5.0 is vulnerable to Cross Site Request Forgery (CSRF) at concrete/controllers/dialog/event/duplicate. The Concrete CVE-2026-841409.8Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and CVE-2026-841419.8Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and TCVE-2026-841429.8Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or another security-relevant defecCVE-2026-841439.8Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed evidence of meCVE-2026-841447.5Internally found bugs present in Thunderbird 154 and Thunderbird ESR 153.1. Some of these bugs showed evidence of memory corruption or anothCVE-2026-841457.5Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed evidence of me
CVE-2026-84134: Critical severity, CVSS 9.8 | Vulnix