🔐 CVE Alert

CVE-2026-3889

MEDIUM 6.5

Spoofing issue in Thunderbird

CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th

Spoofing issue in Thunderbird. This vulnerability was fixed in Thunderbird 149 and Thunderbird 140.9.

Vendor mozilla
Product thunderbird
Ecosystems
Industries
Technology
Published Mar 24, 2026
Last Updated Apr 13, 2026
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Affected Versions

Mozilla / Thunderbird
All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2020723 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-23/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-24/

Credits

Eemeli Aro