User Impersonation Affecting thunderbird package, versions [,140.9.0)[141.0.0,149.0.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-THUNDERBIRD-15763368
- published25 Mar 2026
- disclosed24 Mar 2026
- creditEemeli Aro
Introduced: 24 Mar 2026
CVE-2026-3889 (opens in a new tab)How to fix?
Upgrade thunderbird to version 140.9.0, 149.0.0 or higher.
Overview
Affected versions of this package are vulnerable to User Impersonation through the rendering of email content. An attacker can deceive users by crafting messages that appear to originate from trusted sources.