Vulnerability in Trusted Domain Project Opendmarc
CVE-2026-101278
A weakness has been identified in Trusted Domain Project OpenDMARC up to 1.4.2. This affects the function opendmarc_get_tld of the file libopendmarc/opendmarc_tld.c : of the component PSL Wildcard Handler. Executing a manipulation can lead to origin validation error. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Published .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Trusted Domain Project Opendmarc — versions 1.4.0, 1.4.1, 1.4.2
Weakness classification (CWE)
References
- vuldb.com/vuln/411035 (technical-description, vdb-entry)
- vuldb.com/vuln/411035/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-101278 (third-party-advisory)
- vuldb.com/submit/918273 (third-party-advisory)
- xuyongzhe-vt.github.io/share/opendmarc-psl-wildcard-orgdomain.html (exploit)
Frequently asked questions
- What is CVE-2026-101278?
- CVE-2026-101278 is a medium-severity vulnerability in Trusted Domain Project Opendmarc, classified under Insufficient Verification of Data Authenticity. CVSS score: 4.3/10. Published 2026-09-29.
- How severe is CVE-2026-101278?
- Medium severity. CVSS v3 base score is 4.3 out of 10.