CVE-2026-16365 | Privilege escalation in the DOM: Workers component. This vul… | CVSS 9.8 CRITICAL

Description

Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

9.8 CRITICAL CVSS 3.1

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

SSVC — CISA Coordinator

Affected products (2)

Vendor	Product	Platform	Versions
Mozilla	Firefox	—	153 ≤ *
Mozilla	Thunderbird	—	153 ≤ *

Weakness (CWE)

CWE	Source	Description
CWE-269	adp	CWE-269 Improper Privilege Management
CWE-284	adp	CWE-284 Improper Access Control

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (3)