CVE-2026-92076

Awaiting Analysis Awaiting Analysis - Queue

Incorrect Boundary Conditions in Firefox Networking Component

Publication date: 2026-09-15

Last updated on: 2026-09-22

Assigner: Mozilla Corporation

Description

Incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-15

Last Modified

2026-09-22

Generated

2026-10-05

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-92076

EUVD

EUVD-2026-78461

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	156
mozilla	firefox_esr	153.3

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-119	The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Attack-Flow Graph

Executive Summary

This vulnerability involves incorrect boundary conditions in the Networking component of Firefox and Firefox ESR. It was addressed in Firefox 156 and Firefox ESR 153.3.

Detection Guidance

This vulnerability is specific to outdated versions of Firefox, Firefox ESR, and Thunderbird. Detection involves checking installed versions of these applications. For Firefox, run 'firefox --version' or check 'about:support' in the browser. For Thunderbird, run 'thunderbird --version'. If versions are below 156 (Firefox/Thunderbird) or 153.3 (Firefox ESR), the system is vulnerable.

Impact Analysis

An attacker could exploit this to cause unexpected behavior or crashes in the affected software, potentially leading to denial of service or other unintended consequences.

Mitigation Strategies

Update Firefox to version 156 or later and Firefox ESR to version 153.3 or later to address the vulnerability.

Hi! I’m here to help you understand CVE-2026-92076. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70