CVE-2026-12301: Vulnerability in Mozilla Firefox
Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
AI Analysis
Technical Summary
This vulnerability is a memory safety bug in Mozilla Firefox that was resolved in Firefox 152. It was reported by Richard Belisle and is part of a broader set of memory safety issues fixed in the same release. The Mozilla advisory (MFSA 2026-57) confirms the fix and categorizes the impact as moderate. The vulnerability affects Firefox versions prior to 152. No detailed technical exploitation information or CVSS score is provided.
Potential Impact
The vulnerability could potentially lead to memory corruption issues. While the exact exploitation details are not provided, memory safety bugs can lead to arbitrary code execution or crashes. The vendor rates the impact as moderate, indicating a significant but not critical risk. There are no reports of active exploitation in the wild.
Mitigation Recommendations
A fix for this vulnerability is available in Firefox 152. Users and administrators should update to Firefox 152 or later to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-12301: Vulnerability in Mozilla Firefox
Description
Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
CVSS v3.1
Score 5.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability is a memory safety bug in Mozilla Firefox that was resolved in Firefox 152. It was reported by Richard Belisle and is part of a broader set of memory safety issues fixed in the same release. The Mozilla advisory (MFSA 2026-57) confirms the fix and categorizes the impact as moderate. The vulnerability affects Firefox versions prior to 152. No detailed technical exploitation information or CVSS score is provided.
Potential Impact
The vulnerability could potentially lead to memory corruption issues. While the exact exploitation details are not provided, memory safety bugs can lead to arbitrary code execution or crashes. The vendor rates the impact as moderate, indicating a significant but not critical risk. There are no reports of active exploitation in the wild.
Mitigation Recommendations
A fix for this vulnerability is available in Firefox 152. Users and administrators should update to Firefox 152 or later to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-06-15T15:08:11.001Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-57/","vendor":"Mozilla"}]
Threat ID: 6a314c7e0b89be6888b4cc81
Added to database: 6/16/2026, 1:15:42 PM
Last enriched: 6/16/2026, 1:46:20 PM
Last updated: 6/17/2026, 4:57:29 AM
Views: 11
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