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
This vulnerability (CVE-2025-49709) affects Mozilla Firefox and involves memory corruption caused by specific canvas operations. It is classified under CWE-787 (Out-of-bounds Write). The vulnerability has a CVSS v3.1 score of 9.8, indicating critical severity with network attack vector, low attack complexity, no privileges or user interaction required, and impacts confidentiality, integrity, and availability. Mozilla addressed this issue in Firefox 139.0.4 as documented in their security advisory MFSA 2025-47.
Potential Impact
Successful exploitation of this vulnerability could lead to memory corruption, potentially allowing an attacker to execute arbitrary code or cause a denial of service. The CVSS score of 9.8 reflects a critical impact on confidentiality, integrity, and availability. However, no known exploits have been reported in the wild so far.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 139.0.4. Users and administrators should update to this version or later to remediate the issue. Since this is not a cloud service, remediation depends on applying the vendor's update. Patch status is confirmed by the vendor advisory.
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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2025-49709) affects Mozilla Firefox and involves memory corruption caused by specific canvas operations. It is classified under CWE-787 (Out-of-bounds Write). The vulnerability has a CVSS v3.1 score of 9.8, indicating critical severity with network attack vector, low attack complexity, no privileges or user interaction required, and impacts confidentiality, integrity, and availability. Mozilla addressed this issue in Firefox 139.0.4 as documented in their security advisory MFSA 2025-47.
Potential Impact
Successful exploitation of this vulnerability could lead to memory corruption, potentially allowing an attacker to execute arbitrary code or cause a denial of service. The CVSS score of 9.8 reflects a critical impact on confidentiality, integrity, and availability. However, no known exploits have been reported in the wild so far.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 139.0.4. Users and administrators should update to this version or later to remediate the issue. Since this is not a cloud service, remediation depends on applying the vendor's update. Patch status is confirmed by the vendor advisory.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- mozilla
- Date Reserved
- 2025-06-09T20:17:23.292Z
- Cvss Version
- null
- State
- PUBLISHED
Threat ID: 6849756223110031d40fa8c2
Added to database: 6/11/2025, 12:24:02 PM
Last enriched: 4/14/2026, 11:45:55 AM
Last updated: 5/9/2026, 5:06:48 AM
Views: 95
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