CVE-2026-84132
Received Received - Intake

Information Disclosure in Firefox Networking HTTP Component

Publication date: 2026-09-01

Last updated on: 2026-09-01

Assigner: Mozilla Corporation

Description
Information disclosure in the Networking: HTTP component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-09-01
Last Modified
2026-09-01
Generated
2026-09-01
AI Q&A
2026-09-01
EPSS Evaluated
N/A
NVD
CVE-2026-84132
EUVD
EUVD-2026-69080

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox to 155 (inc)
mozilla firefox_esr to 153.2 (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 an information disclosure vulnerability in the Networking: HTTP component of Firefox and Firefox ESR. It was patched in Firefox 155 and Firefox ESR 153.2.

Detection Guidance

This vulnerability is specific to Firefox versions before 155 and Firefox ESR before 153.2. To detect it, check your installed Firefox version using commands like 'firefox --version' or 'apt show firefox' on Linux. If the version is below 155 or ESR below 153.2, the system is vulnerable.

Impact Analysis

An attacker could exploit this to access sensitive information transmitted over HTTP, potentially exposing data like credentials or session tokens.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, violating GDPR's data protection principles or HIPAA's safeguards for protected health information.

Mitigation Strategies

Update Firefox to version 155 or later and Firefox ESR to version 153.2 or later to address the information disclosure vulnerability.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-84132. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart