Detections
Analytics

Mozilla Firefox < 150.0

medium Nessus Plugin ID 307895

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Synopsis

A web browser installed on the remote macOS or Mac OS X host is affected by multiple vulnerabilities.

Description

The version of Firefox installed on the remote macOS or Mac OS X host is prior to 150.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2026-30 advisory.

 - Incorrect boundary conditions, integer overflow in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 150 and Thunderbird 150. (CVE-2026-6783)

 - Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6746)

 - Use-after-free in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6747)

 - Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10. (CVE-2026-6748, CVE-2026-6751)

 - Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
 (CVE-2026-6749)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Mozilla Firefox version 150.0 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2026-30/

Plugin Details

Severity: Medium

ID: 307895

File Name: macos_firefox_150_0.nasl

Version: 1.7

Type: Local

Agent: macosx

Published: 4/21/2026

Updated: 5/8/2026

Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 8.1

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2026-6783

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:mozilla:firefox

Required KB Items: installed_sw/Mozilla Firefox

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/21/2026

Vulnerability Publication Date: 4/21/2026

Reference Information

CVE: CVE-2026-6746, CVE-2026-6747, CVE-2026-6748, CVE-2026-6749, CVE-2026-6750, CVE-2026-6751, CVE-2026-6752, CVE-2026-6753, CVE-2026-6754, CVE-2026-6755, CVE-2026-6756, CVE-2026-6757, CVE-2026-6758, CVE-2026-6759, CVE-2026-6760, CVE-2026-6761, CVE-2026-6762, CVE-2026-6763, CVE-2026-6764, CVE-2026-6765, CVE-2026-6766, CVE-2026-6767, CVE-2026-6768, CVE-2026-6769, CVE-2026-6770, CVE-2026-6771, CVE-2026-6772, CVE-2026-6773, CVE-2026-6774, CVE-2026-6775, CVE-2026-6776, CVE-2026-6777, CVE-2026-6778, CVE-2026-6779, CVE-2026-6780, CVE-2026-6781, CVE-2026-6782, CVE-2026-6783, CVE-2026-6784, CVE-2026-6785, CVE-2026-6786, CVE-2026-7321, CVE-2026-8091

IAVA: 2026-A-0388-S