CVE-2021-34555: Fedoraproject Fedora

High severity, CVSS 7.5. EPSS: 2.7% chance of exploitation in the next 30 days.

OpenDMARC 1.4.1 and 1.4.1.1 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a multi-value From header field.

Affected products

• Fedoraproject Fedora: version 33 only; version 34 only
• Trusteddomain Opendmarc: version 1.4.1 only; version 1.4.1.1 only

Published 2021-06-10. Last modified 2026-06-17.