CVE-2026-12319: Vulnerability in Mozilla Firefox
CVE-2026-12319 is a denial-of-service vulnerability in the Audio/Video playback component of Mozilla Firefox. This vulnerability affects Firefox versions prior to 152 and was fixed in Firefox 152. The issue can cause application disruption but does not impact confidentiality or integrity. The vulnerability is part of a broader set of security fixes released in Firefox 152 addressing multiple memory safety, sandbox escape, and other security issues. No known exploits are reported in the wild for this specific vulnerability.
AI Analysis
Technical Summary
CVE-2026-12319 is a denial-of-service (DoS) vulnerability classified under CWE-400 affecting the Audio/Video playback component in Mozilla Firefox. It allows an attacker to cause a disruption of service, impacting availability but not confidentiality or integrity. The vulnerability was resolved in Firefox 152. This fix is part of a comprehensive security update that addresses numerous high-impact memory safety bugs and sandbox escapes across Firefox and Thunderbird products. The CVSS v3.1 score is 6.5 (medium severity), reflecting the network attack vector, low attack complexity, no privileges required, user interaction required, and impact limited to availability.
Potential Impact
Successful exploitation of this vulnerability can cause denial-of-service conditions in Firefox, resulting in application crashes or unavailability of audio/video playback functionality. There is no impact on confidentiality or integrity. No known exploits in the wild have been reported for this vulnerability.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 152. Users and administrators should update affected Firefox installations to version 152 or later to remediate this issue. Since this is a client-side application vulnerability, applying the update is the recommended and sufficient mitigation. No additional action is required beyond upgrading to the fixed version.
CVE-2026-12319: Vulnerability in Mozilla Firefox
Description
CVE-2026-12319 is a denial-of-service vulnerability in the Audio/Video playback component of Mozilla Firefox. This vulnerability affects Firefox versions prior to 152 and was fixed in Firefox 152. The issue can cause application disruption but does not impact confidentiality or integrity. The vulnerability is part of a broader set of security fixes released in Firefox 152 addressing multiple memory safety, sandbox escape, and other security issues. No known exploits are reported in the wild for this specific vulnerability.
CVSS v3.1
Score 6.5medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12319 is a denial-of-service (DoS) vulnerability classified under CWE-400 affecting the Audio/Video playback component in Mozilla Firefox. It allows an attacker to cause a disruption of service, impacting availability but not confidentiality or integrity. The vulnerability was resolved in Firefox 152. This fix is part of a comprehensive security update that addresses numerous high-impact memory safety bugs and sandbox escapes across Firefox and Thunderbird products. The CVSS v3.1 score is 6.5 (medium severity), reflecting the network attack vector, low attack complexity, no privileges required, user interaction required, and impact limited to availability.
Potential Impact
Successful exploitation of this vulnerability can cause denial-of-service conditions in Firefox, resulting in application crashes or unavailability of audio/video playback functionality. There is no impact on confidentiality or integrity. No known exploits in the wild have been reported for this vulnerability.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 152. Users and administrators should update affected Firefox installations to version 152 or later to remediate this issue. Since this is a client-side application vulnerability, applying the update is the recommended and sufficient mitigation. No additional action is required beyond upgrading to the fixed version.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-06-15T15:08:18.531Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-57/","vendor":"Mozilla"}]
Threat ID: 6a314c830b89be6888b4cdc2
Added to database: 06/16/2026, 13:15:47 UTC
Last enriched: 06/23/2026, 15:19:26 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 52
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