Thunderbird Email Client Spoofing Issue <149, <140.9
CVE-2026-3889 Published on March 24, 2026

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

NVD

Products Associated with CVE-2026-3889

Want to know whenever a new CVE is published for Mozilla Thunderbird? stack.watch will email you.

Mozilla Thunderbird

Affected Versions

Mozilla Thunderbird:

Version unspecified and below 149 is affected.

Mozilla Thunderbird:

Version unspecified and below 140.9 is affected.