CVE-2026-3889

Spoofing issue in Thunderbird

Medium · published March 24, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
29.5
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00368 · 29.5th percentile
Published
2026-03-24T20:27Z
EPSS history
Timeline
  • 24 MAR 20:27Z
    Spoofing issue in Thunderbird
    cvelistv5