CVE-2026-3889 Details
Description
Spoofing issue in Thunderbird. This vulnerability was fixed in Thunderbird 149 and Thunderbird 140.9.
A spoofing vulnerability has been identified in Mozilla Thunderbird versions prior to 149 and prior to 140.9. This issue arises from certain flaws that, while generally not exploitable through email due to disabled scripting, could pose risks in browser or browser-like contexts.
Users can upgrade to Thunderbird versions 149 or 140.9 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 25, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=2020723 | [email protected] | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2026-23/ | [email protected] | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-24/ | [email protected] | Vendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-451 | User Interface (UI) Misrepresentation of Critical Information | CISA-ADP |
Affected Products
| Product | Versions |
|---|---|
| mozilla thunderbird | < 140.9.0 < 149.0 |
CPE
Remediation
| |
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 13, 2026 | CVE Modified | [email protected] |
| Mar 27, 2026 | Initial Analysis | [email protected] |
| Mar 25, 2026 | CVE Modified | CISA-ADP |
| Mar 24, 2026 | New CVE Received | [email protected] |