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CVE-2026-101280

Trusted Domain Project OpenDMARC Multi-Record Set opendmarc_policy_query_dmarc authentication spoofing

CVSS 4.0 6.9 MEDIUMCVSS 3.1 7.3 HIGHCVSS 3.0 7.3 HIGHCVSS 2.0 7.5 Check source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-101280

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-101280

Published

OpenDMARC

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Trusted Domain Project",
                    "product": "OpenDMARC",
                    "versions": [
                        {
                            "version": "1.4.0",
                            "status": "affected"
                        },
                        {
                            "version": "1.4.1",
                            "status": "affected"
                        },
                        {
                            "version": "1.4.2",
                            "status": "affected"
                        }
                    ],
                    "cpes": [
                        "cpe:2.3:a:trusted_domain_project:opendmarc:*:*:*:*:*:*:*:*"
                    ],
                    "modules": [
                        "Multi-Record Set Handler"
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON