CVE-2026-101281: Trusted Domain Project Opendmarc

High severity, CVSS 7.3. EPSS: 0.4% chance of exploitation in the next 30 days.

A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_sp2_find_mailfrom_domain of the file libopendmarc/opendmarc_spf.c of the component SPF Macro Handler. This manipulation causes improper authentication. The attack is possible to be carried out remotely. The exploit has been published and may be used. Patch name: c48a74c758677fc5272a73eff15ffdbf8afda1a6. Applying a patch is the recommended action to fix this issue.

Affected products

Published 2026-09-29. Last modified 2026-10-01.