High 7.3Published Sep 29, 2026

CVE-2026-101281Trusted Domain Project OpenDMARC SPF Macro opendmarc_spf.c opendmarc_sp2_find_mailfrom_domain improper authentication

Updated under an hour ago (2026-10-19 08:50 UTC)

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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 0.41%, higher than 33% of scored CVEs.

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Every CVE for Trusted Domain Project OpenDMARC

Exploited in the last 30 days

A flaw has been found in Trusted Domain Project OpenDMARC up to 1.4.2. Affected by this vulnerability is the function opendmarc_sp2_find_mailfrom_domain of the file libopendmarc/opendmarc_spf.c of the component SPF Macro Handler. This manipulation causes improper authentication. The attack is possible to be carried out remotely. The exploit has been published and may be used. Patch name: c48a74c758677fc5272a73eff15ffdbf8afda1a6. Applying a patch is the recommended action to fix this issue.

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:O/RC:C
Weakness (CWE): CWE-287
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.41% (percentile 33)
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Oct 1, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

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/411038vdb-entry, technical-description
https://vuldb.com/vuln/411038/ctisignature, permissions-required
https://vuldb.com/cve/CVE-2026-101281third-party-advisory
https://vuldb.com/submit/918284third-party-advisory
https://github.com/trusteddomainproject/OpenDMARC/issues/262issue-tracking
https://github.com/trusteddomainproject/OpenDMARC/pull/328issue-tracking, patch
https://xuyongzhe-vt.github.io/share/opendmarc-spf-postmaster-macro.htmlexploit
https://github.com/trusteddomainproject/OpenDMARC/commit/c48a74c758677fc5272a73eff15ffdbf8afda1a6patch

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.