CVE-2026-74942

HighCVSS 8.8/10Last modified Aug 21, 2026

Description

Privilege escalation in the Remote Settings Client component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-269

Affected software

No affected versions have been published.

Timeline

Published
Aug 18, 2026
Last modified
Aug 21, 2026
NVD status
Analyzed

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CVE-2026-74942: High severity, CVSS 8.8 | Vulnix