Umbra

This is the repo for Umbra browser dustribution. Umbra source code is not found here, we build umbra with a script named fern.js Out build system can be found here:https://github.com/openconstruct/user-agent-desktop Umbra is an opnionated privacy browser based on Mozilla Firefox ESR. All telemetr...

[SECURITY] [DSA 6481-1] firefox-esr security update

------------------------------------------------------------------------- Debian Security Advisory DSA-6481-1 [email protected] https://www.debian.org/security/ Moritz Muehlenhoff September 02, 2026 https://www.debian.org/security/faq -...

Debian dsa-6481 : firefox-esr - security update

The remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6481 advisory. - ------------------------------------------------------------------------- Debian Security Advisory DSA-6481-1 [email protected] https://www.debian.org/securit...

OPENSUSE-SU-2026:11666-1 firefox-esr-153.2.0-1.1 on GA media

These are all security issues fixed in the firefox-esr-153.2.0-1.1 package on the GA media of openSUSE Tumbleweed...

CVE-2026-84133

Site isolation issue in the DOM: Push Subscriptions component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2...

CVE-2026-84134

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

CVE-2026-84131

Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2...

CVE-2026-84137

Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2...

CVE-2026-84120

A flaw was found in the Audio/Video component of Firefox and Firefox ESR. This use-after-free vulnerability could allow a remote attacker to achieve arbitrary code execution. A use-after-free occurs when a program attempts to use memory that has been deallocated, which can lead to memory corrupti...

EUVD-2026-69092

Internally found bugs present in Thunderbird 154 and Thunderbird ESR 153.1. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155,...

CVE-2026-84144

CVE-2026-84144 covers internally found bugs in Mozilla Thunderbird 154 and Thunderbird ESR 153.1 , some showing evidence of memory corruption or other security-relevant defects. The vendor presumes some could have been exploited with sufficient effort. The issue is fixed in Thunderbird 155 , Thun...

CVE-2026-84143 Internally found bugs fixed in Thunderbird 155, Thunderbird ESR 153.2 and Thunderbird ESR 140.15

Internally found bugs present in Thunderbird 154, Thunderbird ESR 153.1 and Thunderbird ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was...

CVE-2026-84141

CVE-2026-84141 is an integer overflow in the Graphics: ImageLib component of Mozilla's image processing library, enabling remote code execution via crafted image content. The vulnerability affects Firefox (before 155), Firefox ESR (before 153.2), Thunderbird (before 155), and Thunderbird ESR (bef...

EUVD-2026-69087

Clickjacking issue in the DOM: Events component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2...

CVE-2026-84139

A clickjacking vulnerability in the DOM: Events component affects Firefox , Firefox ESR , Thunderbird , and Thunderbird ESR . It was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2. The vulnerability is part of a broader batch of issues disclosed via Mozilla adviso...

CVE-2026-84139

Clickjacking issue in the DOM: Events component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2...

CVE-2026-84137

CVE-2026-84137 is a spoofing (Security UI) vulnerability in the DOM: Core & HTML component of Mozilla products, allowing an attacker to spoof the user interface. It was fixed in Firefox 155 , Firefox ESR 153.2 , Thunderbird 155 , and Thunderbird 153.2 . Notably, NVD assigns a 4.3 (Medium) score w...

CVE-2026-84137 Spoofing issue in the DOM: Core & HTML component

Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2...

CVE-2026-84136

CVE-2026-84136 is a remote code execution vulnerability in the DOM: Navigation component of Mozilla products, affecting Firefox (before 155), Firefox ESR (before 153.2), Thunderbird (before 155), and Thunderbird ESR (before 153.2). Per Kaspersky, it can be exploited remotely to execute arbitrary ...

CVE-2026-84134 Other issue in the Profile Backup component

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