CVE-2026-74966: Vulnerability in Mozilla Firefox
Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
AI Analysis
Technical Summary
CVE-2026-74966 is an information disclosure vulnerability affecting the Form Autofill component in Mozilla Firefox. The flaw could potentially allow unauthorized access to sensitive form autofill data. Mozilla addressed this vulnerability in Firefox 154 and Firefox ESR 153.1 as part of a broader security update that fixed multiple high and moderate impact vulnerabilities. The fix is officially released and available to users who upgrade to these versions or later.
Potential Impact
The vulnerability could lead to unauthorized disclosure of information stored in the Form Autofill component, potentially exposing sensitive user data. The impact is rated moderate by Mozilla. There are no known exploits in the wild for this vulnerability. The fix eliminates the risk by correcting the underlying issue in the affected component.
Mitigation Recommendations
Users and administrators should update Mozilla Firefox to version 154 or later, or Firefox ESR to version 153.1 or later, to remediate this vulnerability. Mozilla has officially fixed this issue in these releases. No additional mitigation steps are required beyond applying the official update.
CVE-2026-74966: Vulnerability in Mozilla Firefox
Description
Information disclosure in the Form Autofill component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-74966 is an information disclosure vulnerability affecting the Form Autofill component in Mozilla Firefox. The flaw could potentially allow unauthorized access to sensitive form autofill data. Mozilla addressed this vulnerability in Firefox 154 and Firefox ESR 153.1 as part of a broader security update that fixed multiple high and moderate impact vulnerabilities. The fix is officially released and available to users who upgrade to these versions or later.
Potential Impact
The vulnerability could lead to unauthorized disclosure of information stored in the Form Autofill component, potentially exposing sensitive user data. The impact is rated moderate by Mozilla. There are no known exploits in the wild for this vulnerability. The fix eliminates the risk by correcting the underlying issue in the affected component.
Mitigation Recommendations
Users and administrators should update Mozilla Firefox to version 154 or later, or Firefox ESR to version 153.1 or later, to remediate this vulnerability. Mozilla has officially fixed this issue in these releases. No additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-08-17T11:58:35.525Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-74/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-77/","vendor":"Mozilla"}]
Threat ID: 6a845509c6e8be0332367441
Added to database: 08/18/2026, 12:50:17 UTC
Last enriched: 08/18/2026, 13:27:01 UTC
Last updated: 08/18/2026, 19:05:04 UTC
Views: 2
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