CVE-2026-0883: Vulnerability in Mozilla Firefox
Information disclosure in the Networking component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
AI Analysis
Technical Summary
This vulnerability involves information disclosure within the Networking component of Mozilla Firefox. It was reported by Vladislav Plyatsok and assigned CVE-2026-0883. The issue was addressed and fixed in Firefox 147 and Firefox ESR 140.7. The CVSS 3.1 vector indicates the vulnerability is remotely exploitable without privileges or user interaction, with a confidentiality impact but no integrity or availability impact. The vendor advisory confirms the fix and categorizes the impact as moderate.
Potential Impact
The vulnerability allows an attacker to disclose information through the Networking component, potentially exposing sensitive data. The impact is limited to confidentiality with no effect on integrity or availability. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 147 and Firefox ESR 140.7. Users and administrators should update to these versions or later to remediate the issue. Since the vulnerability is patched, no additional mitigation steps are required.
CVE-2026-0883: Vulnerability in Mozilla Firefox
Description
Information disclosure in the Networking component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
CVSS v3.1
Score 5.3medium
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves information disclosure within the Networking component of Mozilla Firefox. It was reported by Vladislav Plyatsok and assigned CVE-2026-0883. The issue was addressed and fixed in Firefox 147 and Firefox ESR 140.7. The CVSS 3.1 vector indicates the vulnerability is remotely exploitable without privileges or user interaction, with a confidentiality impact but no integrity or availability impact. The vendor advisory confirms the fix and categorizes the impact as moderate.
Potential Impact
The vulnerability allows an attacker to disclose information through the Networking component, potentially exposing sensitive data. The impact is limited to confidentiality with no effect on integrity or availability. There are no reports of active exploitation in the wild.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 147 and Firefox ESR 140.7. Users and administrators should update to these versions or later to remediate the issue. Since the vulnerability is patched, no additional mitigation steps are required.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-01-13T13:30:55.877Z
- State
- PUBLISHED
Threat ID: 69664f11a60475309f2ea30e
Added to database: 01/13/2026, 13:56:33 UTC
Last enriched: 04/14/2026, 11:58:09 UTC
Last updated: 09/10/2026, 22:26:20 UTC
Views: 265
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