CVE-2026-3889

MEDIUM

Spoofing issue in Thunderbird

Title source: cna
STIX 2.1

Description

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

References (3)

Scores

CVSS v3 6.5
EPSS 0.0003
EPSS Percentile 8.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-451
Status published
Products (6)
mozilla/thunderbird < 140.9.0
mozilla/thunderbird < 149.0
Mozilla/Thunderbird 140.9 - 140.*
Mozilla/Thunderbird 149
Mozilla/Thunderbird unspecified - 140.9
Mozilla/Thunderbird unspecified - 149
Published Mar 24, 2026
Tracked Since Mar 25, 2026