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CVE-2026-109771: Vulnerability in Mozilla Firefox

0
Medium
VulnerabilityCVE-2026-109771cvecve-2026-109771
Published: 10/13/2026 (10/13/2026, 12:29:33 UTC)
Source: CVE Database V5
Vendor/Project: Mozilla
Product: Firefox

Description

Information disclosure in the WebRTC: Networking component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

CVSS v3.1

Score 4.3medium

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Affected software

Mozilla

Firefox

Mozilla

Thunderbird

GitHub Actionsmore threats →ai
mozilla/firefox
pkg:github/mozilla/firefox
Affected versions
<158

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 10/13/2026, 13:19:30 UTC

Technical Analysis

This vulnerability involves information disclosure within the WebRTC Networking component of Mozilla Firefox. The flaw could potentially allow unauthorized access to information. Mozilla fixed this vulnerability in Firefox 158, mitigating the risk.

Potential Impact

The vulnerability could lead to unauthorized information disclosure through the WebRTC Networking component. However, no known exploits have been reported in the wild, reducing immediate risk.

Mitigation Recommendations

Users should update to Firefox version 158 or later to remediate this vulnerability. Since the fix is officially released, applying the update fully mitigates the issue.

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Technical Details

Data Version
5.2
Assigner Short Name
mozilla
Date Reserved
2026-10-13T00:48:53.766Z
State
PUBLISHED
Vendor Advisory Urls
[{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","vendor":"Mozilla"}]

Threat ID: 6ace2c4f2cdf04f65661d56e

Added to database: 10/13/2026, 13:04:15 UTC

Last enriched: 10/13/2026, 13:19:30 UTC

Last updated: 10/13/2026, 18:57:33 UTC

Views: 7

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