CVE-2020-1946: Apache Spamassassin

Critical severity, CVSS 9.8. EPSS: 6.1% chance of exploitation in the next 30 days.

In Apache SpamAssassin before 3.4.5, malicious rule configuration (.cf) files can be configured to run system commands without any output or errors. With this, exploits can be injected in a number of scenarios. In addition to upgrading to SA version 3.4.5, users should only use update channels or 3rd party .cf files from trusted places.

Affected products

• Apache Spamassassin: before 3.4.5 (fixed in 3.4.5)
• Debian Debian Linux: version 9.0 only; version 10.0 only
• Fedoraproject Fedora: version 32 only; version 33 only; version 34 only

Published 2021-03-25. Last modified 2026-06-17.