CVE-2025-49709: Vulnerability in Mozilla Firefox
Certain canvas operations could have lead to memory corruption. This vulnerability was fixed in Firefox 139.0.4.
AI Analysis
Technical Summary
CVE-2025-49709 is a vulnerability in Mozilla Firefox where certain canvas operations could cause memory corruption. This vulnerability is classified under CWE-787 (Out-of-bounds Write). It was addressed and fixed in Firefox version 139.0.4. The CVSS v3.1 base score is 9.8, indicating a critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. The vendor advisory confirms the fix and provides additional context on the issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code or cause a denial of service due to memory corruption. The high CVSS score reflects the potential for complete system compromise without requiring user interaction or privileges.
Mitigation Recommendations
Users and administrators should update Mozilla Firefox to version 139.0.4 or later to remediate this vulnerability. The vendor advisory confirms that the issue is fixed in this version. No additional mitigation steps are required beyond applying the official update.
CVE-2025-49709: Vulnerability in Mozilla Firefox
Description
Certain canvas operations could have lead to memory corruption. This vulnerability was fixed in Firefox 139.0.4.
CVSS v3.1
Score 9.8critical
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-49709 is a vulnerability in Mozilla Firefox where certain canvas operations could cause memory corruption. This vulnerability is classified under CWE-787 (Out-of-bounds Write). It was addressed and fixed in Firefox version 139.0.4. The CVSS v3.1 base score is 9.8, indicating a critical severity with network attack vector, low attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. The vendor advisory confirms the fix and provides additional context on the issue.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to execute arbitrary code or cause a denial of service due to memory corruption. The high CVSS score reflects the potential for complete system compromise without requiring user interaction or privileges.
Mitigation Recommendations
Users and administrators should update Mozilla Firefox to version 139.0.4 or later to remediate this vulnerability. The vendor advisory confirms that the issue is fixed in this version. No additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- mozilla
- Date Reserved
- 2025-06-09T20:17:23.292Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2025-47/","vendor":"Mozilla"}]
Threat ID: 6849756223110031d40fa8c2
Added to database: 06/11/2025, 12:24:02 UTC
Last enriched: 07/30/2026, 01:01:09 UTC
Last updated: 09/10/2026, 19:36:50 UTC
Views: 159
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