CVE-2026-74952

CVE-2026-74952

Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 154 and Thunderbird 154.

Vulnerability class: Privilege Escalation

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

Frequently asked questions

What is CVE-2026-74952?: CVE-2026-74952 is a high-severity vulnerability, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2026-08-18.
How severe is CVE-2026-74952?: High severity. CVSS v3 base score is 8.8 out of 10.