CVE-2026-74953
Undergoing Analysis Undergoing Analysis - In Progress

Privilege Escalation in Firefox Networking Cookies

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: Mozilla Corporation

Description
Privilege escalation in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-08-18
AI Q&A
2026-08-18
EPSS Evaluated
N/A
NVD
CVE-2026-74953
EUVD
EUVD-2026-60756

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
mozilla firefox to 154 (inc)
mozilla firefox_esr to 140.14 (inc)
mozilla firefox_esr to 153.1 (inc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This is a privilege escalation vulnerability in the Networking: Cookies component of Firefox browsers. It allows an attacker to gain higher privileges than intended, potentially leading to unauthorized access or control.

Impact Analysis

If exploited, this vulnerability could allow attackers to escalate their privileges on your system, potentially accessing sensitive data or performing unauthorized actions. Users of affected Firefox versions should update to the patched versions immediately.

Mitigation Strategies

Update Firefox to version 154 or later, Firefox ESR to version 140.14 or later, or Firefox ESR to version 153.1 or later to address the privilege escalation in the Networking: Cookies component.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-74953. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart