CVE-2026-3889

high

Description

Spoofing issue in Thunderbird. This vulnerability affects Thunderbird < 149 and Thunderbird < 140.9.

References

https://www.mozilla.org/security/advisories/mfsa2026-24/

https://www.mozilla.org/security/advisories/mfsa2026-23/

https://bugzilla.mozilla.org/show_bug.cgi?id=2020723

Details

Source: Mitre, NVD

Published: 2026-03-24

Updated: 2026-03-24

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 8.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Severity: High