CVE-2026-12320: Vulnerability in Mozilla Firefox
CVE-2026-12320 is an information disclosure vulnerability in the Password Manager component of Mozilla Firefox. This vulnerability was fixed in Firefox version 152. The issue could potentially allow unauthorized access to sensitive password data stored by the browser. The vendor advisory confirms the fix was included in Firefox 152.
AI Analysis
Technical Summary
CVE-2026-12320 is an information disclosure vulnerability affecting the Password Manager component of Mozilla Firefox. The vulnerability was publicly disclosed and fixed in Firefox 152. The Mozilla advisory groups this issue among multiple security fixes released in Firefox 152, indicating a low impact severity for this specific vulnerability. No CVSS score is provided. The vulnerability allows potential unauthorized disclosure of stored password information but no further exploitation details are given.
Potential Impact
The vulnerability could lead to unauthorized disclosure of passwords stored in Firefox's Password Manager, potentially compromising user credentials. The impact is assessed as low by Mozilla. There are no known exploits in the wild at the time of disclosure.
Mitigation Recommendations
Mozilla fixed this vulnerability in Firefox 152. Users should update to Firefox 152 or later to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-12320: Vulnerability in Mozilla Firefox
Description
CVE-2026-12320 is an information disclosure vulnerability in the Password Manager component of Mozilla Firefox. This vulnerability was fixed in Firefox version 152. The issue could potentially allow unauthorized access to sensitive password data stored by the browser. The vendor advisory confirms the fix was included in Firefox 152.
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12320 is an information disclosure vulnerability affecting the Password Manager component of Mozilla Firefox. The vulnerability was publicly disclosed and fixed in Firefox 152. The Mozilla advisory groups this issue among multiple security fixes released in Firefox 152, indicating a low impact severity for this specific vulnerability. No CVSS score is provided. The vulnerability allows potential unauthorized disclosure of stored password information but no further exploitation details are given.
Potential Impact
The vulnerability could lead to unauthorized disclosure of passwords stored in Firefox's Password Manager, potentially compromising user credentials. The impact is assessed as low by Mozilla. There are no known exploits in the wild at the time of disclosure.
Mitigation Recommendations
Mozilla fixed this vulnerability in Firefox 152. Users 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
- 2026-06-15T15:08:18.926Z
- 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: 6/16/2026, 1:15:47 PM
Last enriched: 6/16/2026, 1:32:14 PM
Last updated: 6/16/2026, 5:40:18 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.