CVE-2026-101017: Trusted Domain Project Opendmarc

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

A vulnerability was found in Trusted Domain Project OpenDMARC up to 1.4.2. This vulnerability affects the function strcasecmp in the library libopendmarc/opendmarc_policy.c. The manipulation results in handling of exceptional conditions. The attack can be executed remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

• Trusted Domain Project Opendmarc: version 1.4.0 only; version 1.4.1 only; version 1.4.2 only

Published 2026-09-28. Last modified 2026-09-28.