CVE-2026-101280

HIGH 7.3

Trusted Domain Project OpenDMARC Multi-Record Set opendmarc_policy_query_dmarc authentication spoofing

CVSS Score

7.3

EPSS Score

0.0%

EPSS Percentile

0th

A vulnerability was detected in Trusted Domain Project OpenDMARC up to 1.4.2. Affected is the function opendmarc_policy_query_dmarc of the component Multi-Record Set Handler. The manipulation results in authentication bypass by spoofing. The attack can be executed remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CWE	CWE-290 CWE-287
Vendor	trusted domain project
Product	opendmarc
Published	Sep 29, 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:R

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/411037 vuldb.com: https://vuldb.com/vuln/411037/cti vuldb.com: https://vuldb.com/cve/CVE-2026-101280 vuldb.com: https://vuldb.com/submit/918282 xuyongzhe-vt.github.io: https://xuyongzhe-vt.github.io/share/opendmarc-multi-record-downgrade.html

Credits

🔍 yongzhe_xu (VulDB User) VulDB CNA Team