CSS-based exfiltration of the content from partially encrypted emails when allowing remote content. This vulnerability affects Thunderbird < 147.0.1 and Thunderbird < 140.7.1.
History

Thu, 29 Jan 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla thunderbird
Vendors & Products Mozilla
Mozilla thunderbird

Wed, 28 Jan 2026 17:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-116
CWE-200
CWE-352
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 28 Jan 2026 07:45:00 +0000

Type Values Removed Values Added
Description CSS-based exfiltration of the content from partially encrypted emails when allowing remote content. This vulnerability affects Thunderbird < 147.0.1 and Thunderbird < 140.7.1.
Title CSS-based exfiltration of the content from partially encrypted emails when allowing remote content
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published: 2026-01-28T07:39:17.467Z

Updated: 2026-01-28T16:51:16.955Z

Reserved: 2026-01-09T16:32:39.712Z

Link: CVE-2026-0818

cve-icon Vulnrichment

Updated: 2026-01-28T16:49:29.763Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-28T08:16:03.113

Modified: 2026-01-29T16:31:35.700

Link: CVE-2026-0818

cve-icon Redhat

No data.