Improper input validation in Trusted Domain Project Opendmarc
CVE-2026-101015
A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this issue is some unknown functionality of the file policy.c of the component Domain Handler. Executing a manipulation can lead to improper validation of unsafe equivalence in input. The attack may be launched remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published .
CVSS v3 metric
CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.
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/410885 (vdb-entry)
- vuldb.com/vuln/410885/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-101015 (third-party-advisory)
- vuldb.com/submit/917216 (third-party-advisory)
- weitongli.com/share/opendmarc-unicode-dot-bypass.html (exploit)
Frequently asked questions
- What is CVE-2026-101015?
- CVE-2026-101015 is a high-severity vulnerability in Trusted Domain Project Opendmarc, classified under Improper Input Validation. CVSS score: 7.3/10. Published 2026-09-28.
- How severe is CVE-2026-101015?
- High severity. CVSS v3 base score is 7.3 out of 10.