CVE-2026-101015

HIGH 7.3

Trusted Domain Project OpenDMARC policy.c improper validation of unsafe equivalence in input

CVSS Score

7.3

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-1289 CWE-20
Vendor	trusted domain project
Product	opendmarc
Published	Sep 28, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:C

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

Trusted Domain Project / OpenDMARC

1.4.0 1.4.1 1.4.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/410885 vuldb.com: https://vuldb.com/vuln/410885/cti vuldb.com: https://vuldb.com/cve/CVE-2026-101015 vuldb.com: https://vuldb.com/submit/917216 weitongli.com: https://weitongli.com/share/opendmarc-unicode-dot-bypass.html

Credits

🔍 WeitongLi (VulDB User) VulDB CNA Team