CVE-2026-100795

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Denial-of-Service in Firefox Networking Component

Publication date: 2026-09-29

Last updated on: 2026-09-30

Assigner: Mozilla Corporation

Description

Denial-of-service in the Networking component. This vulnerability was fixed in Thunderbird 157 and Firefox 157.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-29

Last Modified

2026-09-30

Generated

2026-10-19

AI Q&A

2026-09-29

EPSS Evaluated

2026-10-18

NVD

CVE-2026-100795

EUVD

EUVD-2026-88948

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	157

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-770	The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Attack-Flow Graph

Executive Summary

This is a denial-of-service vulnerability in Firefox's Networking component. It allows attackers to crash the browser by exploiting a flaw in network handling, which was fixed in Firefox version 157.

Detection Guidance

This vulnerability is a denial-of-service issue in Firefox's Networking component, fixed in version 157. Detection involves checking Firefox version and monitoring for unusual network activity or crashes. Commands: 'firefox --version' to check version, 'ps aux | grep firefox' to check running processes, and network monitoring tools like 'tcpdump' or 'Wireshark' for suspicious traffic patterns.

Impact Analysis

If exploited, this vulnerability could cause your Firefox browser to crash repeatedly, disrupting your internet access and potentially leading to loss of unsaved work or data.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability is a denial-of-service in Firefox's Networking component, which could disrupt services but lacks details on data exposure or privacy violations required for compliance assessments.

Mitigation Strategies

Update Firefox to version 157 or later to address the denial-of-service vulnerability in the Networking component.

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