CVE-2026-12320: Vulnerability in Mozilla Firefox
CVE-2026-12320 is an information disclosure vulnerability in the Password Manager component of Mozilla Firefox. It affects Firefox versions prior to 152 and was fixed in Firefox 152. The vulnerability has a CVSS score of 4.3 (medium severity) and allows unauthorized disclosure of information without impacting integrity or availability. Mozilla has released an official security advisory confirming the fix in Firefox 152.
AI Analysis
Technical Summary
CVE-2026-12320 is an information disclosure vulnerability classified under CWE-200 affecting the Password Manager component in Mozilla Firefox. This flaw allows an attacker to gain access to sensitive information stored or managed by the Password Manager. The vulnerability was present in Firefox versions before 152 and was resolved in Firefox 152. The vendor advisory from Mozilla confirms the fix and includes this vulnerability among multiple security issues addressed in Firefox 152 and Thunderbird 152. The CVSS v3.1 vector indicates the vulnerability is remotely exploitable without privileges and requires user interaction, with low complexity and only confidentiality impact.
Potential Impact
The vulnerability allows unauthorized disclosure of information from the Password Manager component, potentially exposing stored credentials or sensitive data. There is no impact on integrity or availability. The CVSS score of 4.3 reflects a medium severity level. There are no known exploits in the wild at this time.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 152. Users and administrators should update affected Firefox installations to version 152 or later to remediate this issue. No additional mitigation steps are required beyond applying the official update.
CVE-2026-12320: Vulnerability in Mozilla Firefox
Description
CVE-2026-12320 is an information disclosure vulnerability in the Password Manager component of Mozilla Firefox. It affects Firefox versions prior to 152 and was fixed in Firefox 152. The vulnerability has a CVSS score of 4.3 (medium severity) and allows unauthorized disclosure of information without impacting integrity or availability. Mozilla has released an official security advisory confirming the fix in Firefox 152.
CVSS v3.1
Score 4.3medium
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12320 is an information disclosure vulnerability classified under CWE-200 affecting the Password Manager component in Mozilla Firefox. This flaw allows an attacker to gain access to sensitive information stored or managed by the Password Manager. The vulnerability was present in Firefox versions before 152 and was resolved in Firefox 152. The vendor advisory from Mozilla confirms the fix and includes this vulnerability among multiple security issues addressed in Firefox 152 and Thunderbird 152. The CVSS v3.1 vector indicates the vulnerability is remotely exploitable without privileges and requires user interaction, with low complexity and only confidentiality impact.
Potential Impact
The vulnerability allows unauthorized disclosure of information from the Password Manager component, potentially exposing stored credentials or sensitive data. There is no impact on integrity or availability. The CVSS score of 4.3 reflects a medium severity level. There are no known exploits in the wild at this time.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 152. Users and administrators should update affected Firefox installations to version 152 or later to remediate this issue. No additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-06-15T15:08:18.926Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-57/","vendor":"Mozilla"}]
Threat ID: 6a314c830b89be6888b4cdc6
Added to database: 06/16/2026, 13:15:47 UTC
Last enriched: 06/23/2026, 15:19:33 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 63
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