CVE-2026-0883
Information disclosure in the Networking component
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
Information disclosure in the Networking component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
| Vendor | mozilla |
| Product | firefox |
| Ecosystems | |
| Industries | Technology |
| Published | Jan 13, 2026 |
| Last Updated | Apr 13, 2026 |
Stay Ahead of the Next One
Get instant alerts for mozilla firefox
Be the first to know when new medium vulnerabilities affecting mozilla firefox are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
Mozilla / Firefox
All versions affected Mozilla / Thunderbird
All versions affected References
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=1989340 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-01/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-03/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-04/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-05/
Credits
Vladislav Plyatsok