CVE-2026-16408: Vulnerability in Mozilla Firefox
CVE-2026-16408 is a critical integer overflow vulnerability in the Audio/Video Playback component of Mozilla Firefox. This flaw allows an attacker to cause severe impacts including full confidentiality, integrity, and availability compromise. The vulnerability affects Firefox versions prior to 153 and was fixed in Firefox 153. No known exploits are reported in the wild. The issue is part of a broader set of high-impact vulnerabilities addressed in Firefox 153 and Thunderbird 153.
AI Analysis
Technical Summary
An integer overflow vulnerability exists in the Audio/Video Playback component of Mozilla Firefox, identified as CVE-2026-16408. This vulnerability was resolved in Firefox 153. The flaw could allow an attacker to execute actions leading to complete compromise of confidentiality, integrity, and availability of the affected system. The CVSS v3.1 base score is 9.8, indicating critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and impacts to confidentiality, integrity, and availability. The vendor advisory confirms the fix in Firefox 153 and Thunderbird 153 and lists this vulnerability among multiple high-impact issues addressed in these releases.
Potential Impact
Successful exploitation of this integer overflow vulnerability can result in full compromise of confidentiality, integrity, and availability of the affected Firefox browser. This means attackers could potentially execute arbitrary code, cause crashes, or bypass security controls leading to severe system impact. However, no known exploits are currently reported in the wild.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 153. Users and administrators should update affected Firefox installations to version 153 or later to remediate this issue. For Thunderbird users, updating to Thunderbird 153 or later also addresses this vulnerability. No additional mitigations are specified by the vendor advisory.
CVE-2026-16408: Vulnerability in Mozilla Firefox
Description
CVE-2026-16408 is a critical integer overflow vulnerability in the Audio/Video Playback component of Mozilla Firefox. This flaw allows an attacker to cause severe impacts including full confidentiality, integrity, and availability compromise. The vulnerability affects Firefox versions prior to 153 and was fixed in Firefox 153. No known exploits are reported in the wild. The issue is part of a broader set of high-impact vulnerabilities addressed in Firefox 153 and Thunderbird 153.
CVSS v3.1
Score 9.8critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
An integer overflow vulnerability exists in the Audio/Video Playback component of Mozilla Firefox, identified as CVE-2026-16408. This vulnerability was resolved in Firefox 153. The flaw could allow an attacker to execute actions leading to complete compromise of confidentiality, integrity, and availability of the affected system. The CVSS v3.1 base score is 9.8, indicating critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and impacts to confidentiality, integrity, and availability. The vendor advisory confirms the fix in Firefox 153 and Thunderbird 153 and lists this vulnerability among multiple high-impact issues addressed in these releases.
Potential Impact
Successful exploitation of this integer overflow vulnerability can result in full compromise of confidentiality, integrity, and availability of the affected Firefox browser. This means attackers could potentially execute arbitrary code, cause crashes, or bypass security controls leading to severe system impact. However, no known exploits are currently reported in the wild.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 153. Users and administrators should update affected Firefox installations to version 153 or later to remediate this issue. For Thunderbird users, updating to Thunderbird 153 or later also addresses this vulnerability. No additional mitigations are specified by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:57:48.225Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"}]
Threat ID: 6a5f6cc22a4a8d598926296b
Added to database: 07/21/2026, 12:57:38 UTC
Last enriched: 07/30/2026, 09:52:35 UTC
Last updated: 09/02/2026, 15:04:05 UTC
Views: 68
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