CVE-2026-8961: Vulnerability in Mozilla Firefox
Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
AI Analysis
Technical Summary
CVE-2026-8961 is a spoofing vulnerability affecting the Form Autofill component in Mozilla Firefox. Spoofing vulnerabilities typically allow an attacker to deceive users by presenting false or misleading information. Mozilla fixed this vulnerability in Firefox 151 and Firefox ESR 140.11. The vendor advisory categorizes the impact as low and does not report any active exploitation. This vulnerability is part of a larger set of security issues addressed in these Firefox releases.
Potential Impact
The impact of CVE-2026-8961 is considered low by Mozilla. It involves spoofing in the Form Autofill feature, which could potentially mislead users but does not indicate direct code execution or privilege escalation. There are no reports of exploitation in the wild, reducing immediate risk.
Mitigation Recommendations
An official fix is available and has been released in Firefox 151 and Firefox ESR 140.11. Users and administrators should update affected Firefox installations to these versions or later to remediate this vulnerability. No additional mitigation steps are required beyond applying the official update.
CVE-2026-8961: Vulnerability in Mozilla Firefox
Description
Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-8961 is a spoofing vulnerability affecting the Form Autofill component in Mozilla Firefox. Spoofing vulnerabilities typically allow an attacker to deceive users by presenting false or misleading information. Mozilla fixed this vulnerability in Firefox 151 and Firefox ESR 140.11. The vendor advisory categorizes the impact as low and does not report any active exploitation. This vulnerability is part of a larger set of security issues addressed in these Firefox releases.
Potential Impact
The impact of CVE-2026-8961 is considered low by Mozilla. It involves spoofing in the Form Autofill feature, which could potentially mislead users but does not indicate direct code execution or privilege escalation. There are no reports of exploitation in the wild, reducing immediate risk.
Mitigation Recommendations
An official fix is available and has been released in Firefox 151 and Firefox ESR 140.11. Users and administrators should update affected Firefox installations to these versions or later to remediate this vulnerability. No additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-05-19T12:29:57.815Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-46/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-48/","vendor":"Mozilla"}]
Threat ID: 6a0c677bec166c07b0a993f8
Added to database: 5/19/2026, 1:36:59 PM
Last enriched: 5/19/2026, 1:54:21 PM
Last updated: 5/20/2026, 8:22:17 PM
Views: 9
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