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.
References
| Link | Resource |
|---|---|
| https://bugzilla.mozilla.org/show_bug.cgi?id=1881530 | Permissions Required |
| https://www.mozilla.org/security/advisories/mfsa2026-07/ | Vendor Advisory |
| https://www.mozilla.org/security/advisories/mfsa2026-08/ | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
30 Jan 2026, 18:08
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Mozilla
Mozilla thunderbird |
|
| References | () https://bugzilla.mozilla.org/show_bug.cgi?id=1881530 - Permissions Required | |
| References | () https://www.mozilla.org/security/advisories/mfsa2026-07/ - Vendor Advisory | |
| References | () https://www.mozilla.org/security/advisories/mfsa2026-08/ - Vendor Advisory | |
| CPE | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:* cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:* |
28 Jan 2026, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 4.3 |
| CWE | CWE-200 CWE-352 CWE-116 |
28 Jan 2026, 08:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-01-28 08:16
Updated : 2026-01-30 18:08
NVD link : CVE-2026-0818
Mitre link : CVE-2026-0818
CVE.ORG link : CVE-2026-0818
JSON object : View
Products Affected
mozilla
- thunderbird