CVE-2026-12318: Vulnerability in Mozilla Firefox
Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-12318 involves incorrect boundary conditions in the NSS Libraries component used by Mozilla Firefox. This flaw could potentially lead to security issues but is rated with low impact by Mozilla. The issue was resolved in Firefox 152 as part of a comprehensive security update that addressed numerous vulnerabilities across various components. No detailed exploitation techniques or attack vectors are provided in the advisory. The vendor advisory explicitly states the fix is included in Firefox 152.
Potential Impact
The impact of CVE-2026-12318 is considered low by Mozilla. The vulnerability relates to incorrect boundary conditions, which may cause limited security concerns. There are no reports of active exploitation in the wild. The fix is included in Firefox 152, mitigating any risk for users who have updated to this version or later.
Mitigation Recommendations
Users should update to Firefox version 152 or later to remediate this vulnerability. Mozilla has officially fixed this issue in Firefox 152. No additional mitigation steps are required beyond applying this update.
CVE-2026-12318: Vulnerability in Mozilla Firefox
Description
Incorrect boundary conditions in the Libraries component in NSS. This vulnerability was fixed in Firefox 152 and Thunderbird 152.
CVSS v3.1
Score 7.3high
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-12318 involves incorrect boundary conditions in the NSS Libraries component used by Mozilla Firefox. This flaw could potentially lead to security issues but is rated with low impact by Mozilla. The issue was resolved in Firefox 152 as part of a comprehensive security update that addressed numerous vulnerabilities across various components. No detailed exploitation techniques or attack vectors are provided in the advisory. The vendor advisory explicitly states the fix is included in Firefox 152.
Potential Impact
The impact of CVE-2026-12318 is considered low by Mozilla. The vulnerability relates to incorrect boundary conditions, which may cause limited security concerns. There are no reports of active exploitation in the wild. The fix is included in Firefox 152, mitigating any risk for users who have updated to this version or later.
Mitigation Recommendations
Users should update to Firefox version 152 or later to remediate this vulnerability. Mozilla has officially fixed this issue in Firefox 152. No additional mitigation steps are required beyond applying this update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-06-15T15:08:18.136Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-57/","vendor":"Mozilla"}]
Threat ID: 6a314c810b89be6888b4cd7a
Added to database: 6/16/2026, 1:15:45 PM
Last enriched: 6/16/2026, 1:32:25 PM
Last updated: 6/16/2026, 6:35:35 PM
Views: 3
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.