Trusted Domain Project OpenDMARC Multi-Record Set opendmarc_policy_query_dmarc authentication spoofing
Published Sep 29, 2026
6.9
MEDIUMCVSS 4.0
EPSS 0.40%
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.
Affected products
-
- Version 1.4.0StatusaffectedConstraints-
- Version 1.4.1StatusaffectedConstraints-
- Version 1.4.2StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Trusted Domain Project | OpenDMARC | n/a |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
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
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
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
AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
PoCAutomatable
YesTechnical Impact
PartialDecision
n/aAssessed Sep 29, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.40% (0.00402) | 32.14th | v5 (v2026.06.15) |
| Oct 1, 2026 | 0.40% (0.00402) | 32.07th | v5 (v2026.06.15) |
References (5)
- https://vuldb.com/cve/CVE-2026-101280 third-party-advisory
- https://vuldb.com/submit/918282 third-party-advisory
- https://vuldb.com/vuln/411037 vdb-entrytechnical-description
- https://vuldb.com/vuln/411037/cti signaturepermissions-required
- https://xuyongzhe-vt.github.io/share/opendmarc-multi-record-downgrade.html exploit
| Link | Providers | Tags |
|---|---|---|
| https://vuldb.com/cve/CVE-2026-101280 | third-party-advisory | |
| https://vuldb.com/submit/918282 | third-party-advisory | |
| https://vuldb.com/vuln/411037 | vdb-entrytechnical-description | |
| https://vuldb.com/vuln/411037/cti | signaturepermissions-required | |
| https://xuyongzhe-vt.github.io/share/opendmarc-multi-record-downgrade.html | exploit |
Change history (0)
No recorded changes yet.