CVE-2026-101281: Trusted Domain Project OpenDMARC

Affected products, as the CNA wrote them
Vendor	Product	Versions
Trusted Domain Project	OpenDMARC	affected 1.4.0 affected 1.4.1 affected 1.4.2

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.9	Medium	4.0	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	CNA (VulDB)Used for this record
7.3	High	3.1	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C	CNA (VulDB)
7.3	High	3.0	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C	CNA (VulDB)
7.5	High	2.0	AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:OF/RC:C	CNA (VulDB)

CISA KEV Not listed.
EPSS 0.0041, the 35th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 29 Sept 2026. New records show when each source confirmed them.

Sources

References from the CNA

vuldb.com/vuln/411038 vdb-entrytechnical-description
vuldb.com/vuln/411038/cti signaturepermissions-required
vuldb.com/cve/CVE-2026-101281 third-party-advisory
vuldb.com/submit/918284 third-party-advisory
github.com/trusteddomainproject/OpenDMARC/issues/262 issue-tracking
github.com/trusteddomainproject/OpenDMARC/pull/328 issue-trackingpatch
github.com/trusteddomainproject/OpenDMARC/commit/c48a74c758677fc5272a73eff15ffdbf8afda1a6 patch
xuyongzhe-vt.github.io/share/opendmarc-spf-postmaster-macro.html exploit

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.