CVE-2026-101280Trusted Domain Project OpenDMARC Multi-Record Set opendmarc_policy_query_dmarc authentication spoofing
Updated under an hour ago ()
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It affects Trusted Domain Project OpenDMARC. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.40%, higher than 33% of scored CVEs.
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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.
- CVSS
- 7.3 HIGH (v3.1, CNA)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
- Weakness (CWE)
- CWE-290, CWE-287
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.40% (percentile 33)
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Sep 29, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Trusted Domain Project OpenDMARC trusted_domain_project:opendmarc | 1.4.0; 1.4.1; 1.4.2 | CNA record |
References
- https://vuldb.com/vuln/411037vdb-entry, technical-description
- https://vuldb.com/vuln/411037/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-101280third-party-advisory
- https://vuldb.com/submit/918282third-party-advisory
- https://xuyongzhe-vt.github.io/share/opendmarc-multi-record-downgrade.htmlexploit
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.