vulnerability
Arch Linux: Insufficient validation (CVE-2018-18509)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 5 | (AV:N/AC:L/Au:N/C:N/I:P/A:N) | Apr 26, 2019 | Jul 11, 2025 | Mar 25, 2026 |
Severity
5
CVSS
(AV:N/AC:L/Au:N/C:N/I:P/A:N)
Published
Apr 26, 2019
Added
Jul 11, 2025
Modified
Mar 25, 2026
Description
A flaw during verification of certain S/MIME signatures causes emails to be shown in Thunderbird before 60.5.1 as having a valid digital signature, even if the shown message contents aren't covered by the signature. The flaw allows an attacker to reuse a valid S/MIME signature to craft an email message with arbitrary content.
Solution
arch-linux-upgrade-latest
References
Rapid7 Labs
2026 Global Threat Landscape Report
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