Mozilla Firefox up to 148 Audio/Video reliance on undefined, unspecified, or implementation-defined behavior

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.1$5k-$25k0.00

Summaryinfo

A vulnerability was found in Mozilla Firefox up to 148. It has been rated as critical. This impacts an unknown function of the component Audio/Video. Performing a manipulation results in Remote Code Execution. This vulnerability is cataloged as CVE-2026-4724. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Mozilla Firefox up to 148. It has been classified as critical. This affects an unknown function of the component Audio/Video. The manipulation with an unknown input leads to a remote code execution vulnerability. CWE is classifying the issue as CWE-758. The product uses an API function, data structure, or other entity in a way that relies on properties that are not always guaranteed to hold for that entity. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Undefined behavior in the Audio/Video component. This vulnerability affects Firefox < 149 and Thunderbird < 149.

It is possible to read the advisory at bugzilla.mozilla.org. This vulnerability is uniquely identified as CVE-2026-4724 since 03/24/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 03/28/2026).

The vulnerability scanner Nessus provides a plugin with the ID 304141 (Linux Distros Unpatched Vulnerability : CVE-2026-4724), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 149 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (304141). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 8.1

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔒

ADP CISA Base Score: 9.1
ADP CISA Vector: 🔒

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Reliance on undefined, unspecified, or implementation-defined behavior
CWE: CWE-758
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 304141
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-4724

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Firefox 149

Timelineinfo

03/24/2026 Advisory disclosed
03/24/2026 +0 days CVE reserved
03/24/2026 +0 days VulDB entry created
03/28/2026 +4 days VulDB entry last update

Sourcesinfo

Vendor: mozilla.org
Product: mozilla.org

Advisory: bugzilla.mozilla.org
Status: Confirmed

CVE: CVE-2026-4724 (🔒)
GCVE (CVE): GCVE-0-2026-4724
GCVE (VulDB): GCVE-100-352779

Entryinfo

Created: 03/24/2026 14:47
Updated: 03/28/2026 20:13
Changes: 03/24/2026 14:47 (54), 03/28/2026 14:35 (2), 03/28/2026 20:13 (23)
Complete: 🔍
Cache ID: 216:CC9:103

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