CVE-2026-0890

MEDIUM 5.4

Spoofing issue in the DOM: Copy & Paste and Drag & Drop component

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

Spoofing issue in the DOM: Copy & Paste and Drag & Drop component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

Vendor	mozilla
Product	firefox
Ecosystems	Browser JavaScript
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

NVD ↗ CVE.org ↗ EPSS Data ↗

bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2005081 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

Edgar Chen