CVE-2026-12323: Vulnerability in Mozilla Firefox
Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 152.
AI Analysis
Technical Summary
CVE-2026-12323 is a spoofing vulnerability affecting the DOM: Core & HTML component in Mozilla Firefox. It was fixed in Firefox 152 as part of a security update that addressed numerous vulnerabilities across various Firefox components. The Mozilla advisory MFSA 2026-57 confirms the fix and categorizes the impact of this vulnerability as low. The advisory does not provide a CVSS score but lists the issue among other security fixes released simultaneously. There is no indication of active exploitation in the wild.
Potential Impact
The vulnerability allows spoofing within the DOM Core & HTML component, which could potentially mislead users or web content into believing false information or origins. The Mozilla advisory rates the impact as low for this specific issue. There are no known exploits in the wild, and the vulnerability was fixed in Firefox 152, mitigating the risk for users who have updated.
Mitigation Recommendations
Users and administrators should update Mozilla Firefox to version 152 or later to remediate this vulnerability. The vendor advisory confirms the issue is fixed in Firefox 152. No additional mitigation steps are required beyond applying this official update.
CVE-2026-12323: Vulnerability in Mozilla Firefox
Description
Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 152.
CVSS v3.1
Score 5.4medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12323 is a spoofing vulnerability affecting the DOM: Core & HTML component in Mozilla Firefox. It was fixed in Firefox 152 as part of a security update that addressed numerous vulnerabilities across various Firefox components. The Mozilla advisory MFSA 2026-57 confirms the fix and categorizes the impact of this vulnerability as low. The advisory does not provide a CVSS score but lists the issue among other security fixes released simultaneously. There is no indication of active exploitation in the wild.
Potential Impact
The vulnerability allows spoofing within the DOM Core & HTML component, which could potentially mislead users or web content into believing false information or origins. The Mozilla advisory rates the impact as low for this specific issue. There are no known exploits in the wild, and the vulnerability was fixed in Firefox 152, mitigating the risk for users who have updated.
Mitigation Recommendations
Users and administrators should update Mozilla Firefox to version 152 or later to remediate this vulnerability. The vendor advisory confirms the issue is fixed in Firefox 152. No additional mitigation steps are required beyond applying this official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-06-15T15:08:20.648Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-57/","vendor":"Mozilla"}]
Threat ID: 6a314c830b89be6888b4cdd2
Added to database: 6/16/2026, 1:15:47 PM
Last enriched: 6/16/2026, 1:31:57 PM
Last updated: 6/16/2026, 6:27:39 PM
Views: 3
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