CVE-2026-100891

HIGH 7.3

Trusted Domain Project OpenDMARC Internationalized Domain Name opendmarc_policy.c opendmarc_policy_query_dmarc encoding error

CVSS Score

7.3

EPSS Score

0.0%

EPSS Percentile

0th

A vulnerability has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this issue is the function opendmarc_policy_query_dmarc in the library libopendmarc/opendmarc_policy.c of the component Internationalized Domain Name Handler. Such manipulation leads to encoding error. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CWE	CWE-172
Vendor	trusted domain project
Product	opendmarc
Published	Sep 28, 2026

Stay Ahead of the Next One

Get instant alerts for trusted domain project opendmarc

Be the first to know when new high vulnerabilities affecting trusted domain project opendmarc are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

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/410841 vuldb.com: https://vuldb.com/vuln/410841/cti vuldb.com: https://vuldb.com/cve/CVE-2026-100891 vuldb.com: https://vuldb.com/submit/917215 weitongli.com: https://weitongli.com/share/opendmarc-ulabel-not-converted.html

Credits

🔍 WeitongLi (VulDB User) VulDB CNA Team