CVE-2026-101280
Trusted Domain Project OpenDMARC Multi-Record Set opendmarc_policy_query_dmarc authentication spoofing
- State
- Published
- Severity
- 6.9 Medium
- Published
- Sep 29, 2026
- Updated
- Sep 29, 2026
- Reserved
- Sep 28, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 7.3 High | 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 | VulDB |
| 3.0 | 7.3 High | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R | VulDB |
| 2.0 | 7.5 High | AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
OpenDMARCTrusted Domain Project |
|
References
- VDB-411037 | Trusted Domain Project OpenDMARC Multi-Record Set opendmarc_policy_query_dmarc authentication spoofingvdb-entrytechnical-description
- VDB-411037 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-101280 | CVE Analysis and Reportthird-party-advisory
- Submit #918282 | The Trusted Domain Project OpenDMARC 1.4.2 Improper Authenticationthird-party-advisory
- https://xuyongzhe-vt.github.io/share/opendmarc-multi-record-downgrade.htmlexploit
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