CVE-2026-84138
Received Received - Intake

Denial-of-Service in Firefox PDF Viewer

Publication date: 2026-09-01

Last updated on: 2026-09-01

Assigner: Mozilla Corporation

Description
Denial-of-service in the PDF Viewer component. This vulnerability was fixed in Firefox 155.

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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-2026-84138
EUVD
EUVD-2026-69086

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mozilla firefox 155

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a denial-of-service vulnerability in Firefox's PDF Viewer component. It allows an attacker to crash the application by exploiting a flaw in how it processes PDF files.

Impact Analysis

If exploited, this vulnerability could cause Firefox to crash when viewing a malicious PDF file. This may lead to loss of unsaved work or disruption of services relying on the browser.

Mitigation Strategies

Update Firefox to version 155 or later to address the denial-of-service vulnerability in the PDF Viewer component.

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