PT-2026-77024 · Mozilla · Firefox+1

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CVE-2026-75874

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Published

2026-08-18

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Updated

2026-09-05

CVSS v3.1

10

Critical

VectorAV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions Firefox versions prior to 154 Thunderbird versions prior to 154
Description A sandbox escape exists in the Remote Settings Client component. A sandbox is a security mechanism for separating running programs, ensuring that code executing in a restricted environment cannot access the rest of the system.
Recommendations Update Firefox to version 154 or later. Update Thunderbird to version 154 or later.

Fix

LPE

Protection Mechanism Failure

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Weakness Enumeration

Related Identifiers

CVE-2026-75874
OPENSUSE-SU-2026:11580-1
OPENSUSE-SU-2026:11666-1
OPENSUSE-SU-2026:11678-1
SUSE-SU-2026:3658-1
SUSE-SU-2026:3683-1

Affected Products

Firefox
Thunderbird